CORS 2006 in Montreal has a very impressive group of invited speakers:
– Teodor Gabriel Crainic, École des sciences de la gestion, Université du Québec à Montréal
Planning Models for Transportation in the Electronic Age
– Egon Balas, Carnegie Mellon (IFORS Distinguished Lecturer)
– Jack Edmonds (no web page, but here is a description of some of his work)
Existentially Polytime Theorems
– Ralph E. Gomory, Alfred P. Sloan Foundation
Thoughts about Integer Programming
– Adam N. Letchford, Lancaster University
Semidefinite Programming and Combinatorial Optimization
Definitely some impressive people there!