If you're at the University of Toronto (or even if you're not), you might be interested in the lineup for the Fall 2005 Distinguished Lecture Series:

Sep 6Moshe Vardi, Rice (Logic)
Sep 13Herb Grosch
Sep 20Pamela Zave, At&T (Software Engeneering)
Sep 30Avi Wigderson, IAS (Theory)
Oct 11Russell Stuart, Berkeley (AI)
Oct 25D. Srivastava, At&T (Databases)
Nov 1Mik Lamming, HP (ubiquitous computing)
Nov 8Tony Derose, Pixar (Graphics)
Nov 29Michael Kearns, Upenn (Machine Learning/ Theory)
Dec 6Stefan Savage, UCSD (Systems)

The first talk is right around the corner: Moshe Vardi from Rice will be talking on Tuesday Sep 6, the first day of the academic year. His talk is titled "And Logic Begat Computer Science: When Giants Roamed the Earth". A detailed message is to be sent by Web-Notice. This talk is in SF1101 at 15:10; unless otherwise stated, others will be in BA1180 starting at 11:10.