Convex Sets and their Applications at Banff International Research Station (4-9 March 2006).
Colloquium at the University of British Columbia (24 March 2006). Also the Discrete Mathematics seminar (21 March 2006).
Combinatorics seminar at the University of Minnesota (31 March 2006).
International Conference on Formal Power Series and Algebraic Combinatorics, San Diego, California (19-23 June 2006).
Geometric and Topological Combinatorics, ICM satellite conference, Madrid, Spain, (31 August - 5 September 2006).
Brandeis-Harvard-MIT-Northeastern joint mathematics colloquium (September 14, 2006).
Geometric Combinatorics special session at the Fall 2006 AMS central sectional meeting in Cincinnati, OH (21-22 October 2006).
Margaret Readdy and I are organizing the special session Algebraic and Analytic Combinatorics at the Fall 2006 AMS eastern sectional meeting in Storrs, CT (28-29 October 2006).
2006, 2007 2008 and 2009.