- Dec 21-23, PSG College of Technology, Coimbatore, India, International Conference on Mathematical and Computational Models (ICMCM)
- Dec 12, University of Catania, Catania, Italy, One Day Combinatorial Conference in Memory of Lucia Gionfriddo (photo album here)
- Dec 7-11, University of Newcastle, Australia, 33rd ACCMCC - Australasian Combinatorial Mathematics and Combinatorial Computing
- Nov 26-28, Krakow, Poland, 18th Workshop '3in1' 2009
- Nov 13-14, Magdeburg, Germany, 28th Colloquium on Combinatorics
- Nov 11-13, Kanazawa, Japan, 7th Japan Conference on Computational Geometry and Graphs
- Nov 3-7, Gramado (Rio Grande do Sul), Brazil, LAGOS'09 - V Latin-American Algorithms, Graphs and Optimization Symposium
- Oct 24, Georgia Tech, Atlanta, Theory Day (celebrating 50th FOCS and 20th Anniversary of ACO at Georgia Tech
- Oct 19-22, Minsk, Belarus, Discrete Mathematics, Algebra and Their Applications (DIMA09) (honoring the 80th birthday of Regina Tyshkevich)
- Oct 18-20, Paphos, Cyprus, 2nd International Symposium on Algorithmic Game Theory
- Oct 14-17, University of West Georgia, Carrollton, GA, Integers Conference 2009 (in celebration of the 65th birthdays of Mel Nathanson and Carl Pomerance)
- Oct 5-9, Valtice, Czech Republic, GRASTA Workshop on Graph Searching 2009
- Oct 3-4, Rochester Institute of Technology, Rochester, NY, 23rd Midwest Conference on Combinatorics, Cryptography, and Computing (in honor of the 68th birthday of Wal Wallis)
- Sep 26, Stanford University, Stanford, CA, Randomized Algorithms: Theory and Applications A Workshop in Memory of Rajeev Motwani
- Sep 20-25, Szklarska Poreba, Poland 13th Colourings, Independence, and Domination - Workshop on Graph Theory (CID 2009)
- Sep 22-25, DePaul University, Chicago, IL, GD09 - 17th International Symposium on Graph Drawing
- Sep 10-11, Copenhagen, Denmark, WAOA 2009 - 7th Workshop on Approximation and Online Algorithms
- Sep 7-11, Bordeaux, France, European Conference on Combinatorics, Graph Theory, and Applications (EuroComb'09)
- Aug 23-28, Chicago, IL, 20th International Symposium on Mathematical Programming (ISMP)
- Aug 21-23, Banff Conference Centre, Banff, Alberta, Canada, WADS 2009: Algorithms and Data Structures Symposium (formerly Workshop on Algorithms and Data Structures)
- Aug 21-23, University of California, Berkeley, CA, 12th Intl. Workshop on Approximation Algorithms for Combinatorial Optimization Problems (APPROX 2009), and 13th Intl. Workshop on Randomization and Computation (RANDOM 2009)
- Aug 19-21, Lehigh University, Bethlehem, PA, Modeling and Optimization: Theory and Applications (MOPTA 2009)
- Aug 13-15, University of British Columbia, Vancouver BC, Canada Second CMS/SMM Meeting, 2009, Special Session on Combinatorics and Graph Theory
- Aug 5-8, Michigan Technological University, Houghton, MI, Combinatorial Configurations and their Applications
- Aug 3-9, Poznan, Poland, 14th International Conference on Random Structures and Algorithms (RS&A 2009)
- Jul 20-24, Hagenberg, Austria, 21st Annual International Conference on Formal Power Series and Algebraic Combinatorics
- Jul 18, Emmy Noether Zentrum, Erlangen, Germany, A Saturday on Discrete Mathematics
- Jul 13-17, University of Firenze, Italy, 7th Annual Conference on Permutation Patterns (PP2009)
- Jul 13-15, Niagara Falls, New York, 15th International Computing and Combinatorics Conference (COCOON'2009)
- Jul 6-10, University of St Andrews, Scotland, 22nd British Combinatorial Conference
- Jul 6-10, Denver, CO, SIAM Annual Meeting (includes Minisymposia on enumerative combinatorics, posets, computational biology, optimization/algorithms, and graph theory in honor of Daniel Kleitman's 75th birthday; subsequent Workshop on Paths, Cycles, and Related Structures in Graphs at UC-Denver, July 11-12, contact Mike Jacobson (michael.jacobson@ucdenver.edu) or Mike Ferrara (mjf@uakron.edu))
- Jul 5-10, St. Andrews, Scotland, U.K., 22nd British Combinatorial Conference (BCC22)
- Jul 5-8, Bonn, Germany, 23rd European Conference on Operational Research
- Jul 1-3 2009, University of Bristol, UK, Techniques and Problems in Graph Theory
- Jun 28-Jul 2, Hradec nad Moravici, Czech Republic, IWOCA 2009 - 20th International Workshop on Combinatorial Algorithms
- Jun 26-27, University of Ljubljana, Ljubljana, Slovenia, Tomo is Sixty (dedicated to the 60th birthday of Tomaz Pisanski
- Jun 24-26, Montpellier, France, 35th International Workshop on Graph-Theoretic Concepts in Computer Science (WG 2009)
- Jun 22-25, Renyi Institute, Budapest, Hungary, Phylogenetics Workshop
- Jun 22-24, Lille, France, 20th Annual Symposium on Combinatorial Pattern Matching (CPM 2009)
- Jun 22-24, Royal Holloway, University of London, UK, 20th Postgraduate Combinatorial Conference
- Jun 20-23, Hefei, Anhui, China, FAW 2009 - 3rd International Frontiers of Algorithmics Workshop
- Jun 2-5, Paris, France, CTW09: 8th Cologne-Twente Workshop on Graphs and Combinatorial Optimization
- Jun 1-7, Dubrovnik, Croatia, Algebraic Graph Theory 2009 (a celebration of Gert Sabidussi's 80th birthday
- May 31 - Jun 5, Herl'any, Slovakia, 12th workshop Hereditarnia 2009 (hereditary properties of graphs)
- May 27-29, Center for Operations Research and Econometrics, Catholic University of Louvain, Louvain, Belgiun, Integer Programming at CORE (honoring the career of Laurence Wolsey)
- May 27-29, Rutgers University, New Brunswick, NJ, DIMACS Workshop "Ramsey Theory Yesterday, Today, and Tomorrow"
- May 26-28, Venice, Italy, 7th IAPR -TC-15 Workshop on Graph-based Representations in Pattern Recognition
- May 25 - Jul 23, Technische Universität Berlin and Freie Universität Berlin, Geometric Graphs and Orders (Doc-Course) lecturers Pavel Valtr, Tom Trotter, Olivier Bernardi
- May 25-28, Centre de recherches mathématiques, Montreal, Canada, Second Canadian Discrete and Algorithmic Mathematics Conference (CanaDAM)
- May 22-23, University of Ottawa, Ottawa, Ontario, Canada, Ottawa-Carleton Discrete Mathematics Days 2009
- May 21-23, University of Waterloo, Waterloo, Ontario, Canada Watermellon Workshop on Extremal Graph Theory (Watermellon II)
- May 21-23, Western Kentucky University, Bowling Green, KY, 22nd Cumberland Conference on Combinatorics, Graph Theory, and Computing
- May 20-21, Queen Mary, University of London, and London School of Economics and Political Science, Two One-Day Colloquia in Combinatorics
- May 20-21, Caesarea Rothschild Institute, University of Haifa, Israel, 9th Haifa Workshop on Interdisciplinary Applications of Graph Theory, Combinatorics, and Algorithms
- May 17-19, Hebrew University, Jerusalem, Israel, 22nd Conference of the European Chapter on Combinatorial Optimization (ECCO XXII)
- May 15-21, IPM, Tehran, Iran, IPM 20 - Combinatorics 2009
- May 15-16, Bowling Green State University, Bowling Green, Ohio, MIdwest GrapH TheorY Conference (MIGHTY XLVIII)
- Apr 30-May 1, University of New Brunswick, Saint John, New Brunswick, Canada, Fifth Annual East Coast Combinatorics Conference (ECCC-09)
- Apr 26-29, Pisa, Italy, International Network Optimization Conference INOC 2009
- Apr 25-26, University of Houston, Houston, TX, CombinaTexas'09 (tenth annual meeting)
- Apr 7-9, Institute Henri Poincaré, Paris, Pretty Structure, Existential Polytime and Polyhedral Combinatorics (celebrating Jack Edmonds' 75th birthday)
- Mar 30 - Apr 2, DIMACS Center, Rutgers University, New Brunswick, NJ, DIMACS Workshop on Property Testing
- Mar 27-29, University of Illinois, Urbana, IL, AMS Meeting #1047, Special Sessions on Graph Theory and on Probabilistic and Extremal Combinatorics
- Mar 23-25, Centre for Discrete Mathematics and its Applications (DIMAP), University of Warwick, U. K., Workshop on Algorithmic Graph Theory
- Mar 18, Mathematical Institute, University of Oxford, England, One-Day Meeting in Combinatorics at Oxford
- Mar 16-18, Université Libre de Bruxelles, Brussels, Belgium, 25th European Workshop on Computational Geometry (EuroCG'09)
- Mar 13, CWI Amsterdam, DIAMANT seminar day: Applications of semidefinite programming
- Mar 9-10, DIMACS Center, Rutgers University, New Brunswick, NJ, DIMACS-RUTCOR Workshop on Algorithmic Challenges in Optimization, Game Theory and Computer Science (in Memory of Leo Khachiyan)
- Mar 2-6, Florida Atlantic University, Boca Raton, FL, 40th Southeastern International Conference on Combinatorics, Graph Theory, and Computing.
- Feb 18-20, Indian Statistical Institute, Kolkata, India, 3rd International Workshop on Algorithms and Computation (WALCOM 2009)
- Feb 11-12, Barcelona, Spain, 6th Workshop on Algorithms and Models for the Web Graph (WAW2009)
- Jan 19-23, Estoril, Lisbon, Portugal, Winter School on Network Optimization
- Jan 19-22, Rutgers University, New Brunswick, NJ, DIMACS-RUTCOR Workshop on Boolean and Pseudo-Boolean Functions (in Memory of Peter L. Hammer)
- Jan 10-14, National Sun Yat-Sen University, Kaohsiung, Taiwan 2009 Workshop on Graph Theory
- Jan 7-10, Kalasalingam University, Krishnankoil, India, Fifth International Workshop on Graph Labelings (IWOGL 2009)
- Jan 5-16, Perth, Australia, Group Theory, Combinatorics, and Computation (in honour of Cheryl Praeger's 60th birthday)
- Jan 5-8, Washington, DC, AMS-ASL Special Session on Model Theoretic Methods in Finite Combinatorics
- Jan 4-6, New York, NY, ACM-SIAM Symposium on Discrete Algorithms (SODA09)

Conferences in 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000-1997.

If anyone wants to create such a site for a conference series, I can post that person's emai address so that past attendees can send material (printed material saved by attendees can be scanned and posted). Good candidates for such sites would be EuroComb, AWOCA (Australasian Worshop on Combinatorial Algorithms), CTW (Graphs and Combinatorial Optimization), Ontario Combinatorics Workshops, the Cumberland Conference on Combinatorics and Computing, the MCCCC, the Southeastern International Conferences, Graph Theory Day in New York, etc. I'm sure there are also many other series that would benefit from having such sites.

- ACCOTA (Combinatorial and Computational Aspects of Optimization, Topology and Algebra)
- ACCMCC (Australasian Conferences in Combinatorial Mathematics and Combinatorial Computing)
- BADMath (Bay Area Discrete Mathematics Days)
- BCC (British Combinatorial Conferences)
- C&C (Workshop on Cycles & Colourings - High Tatras)
- CIG (Computational Intelligence and Games
- Clemson Mini-Conference on Discrete Mathematics and Algorithms
- COCOON (Combinatorics and Computing) (maintained by Michael Ley)
- Combinatorial Potlatch (Puget Sound area, maintained by Rob Beezer)
- CoNE - Combinatorists of New England (series ended after 45 meetings - archive by Ruth Haas)
- CombinaTexas (maintained by Catherine Yan)
- DIMACS Reconnect Conferences
- DIMACS Special Years, all DIMACS Workshops
- Discrete Mathematics in New England (maintained by Karen Collins)
- Discrete Mathematics Days in the Northeast (maintained by Karen Collins)
- FPSAC (Formal Power Series and Algebraic Combinatorics)
- GD (Graph Drawing) (maintained by Roberto Tamassia)
- LATIN (Latin American Theoretical INformatics
- MCCCC (Midwest Conference on Combinatorics, Cryptography and Computing) (maintained by Ralucca Gera)
- MIGHTY (MIdwest GrapH TheorY) (maintained by Jay Bagga)
- MOPTA (McMaster Optimization Conference)
- MSRI Workshops (Mathematical Sciences Research Institute
- NSF-CBMS Regional Research Conferences (Conference Board of the Mathematical Sciences)
- Nordic Combinatorial Conference (NORCOM)
- SIAM Discrete Mathematics, SIAM Discrete Algorithms
- WADS (Workshop on Algorithms and Data Structures)
- WG (International Workshop on Graph-Theoretic Concepts in Computer Science)