Microsoft has a few live webcasts in October 2006 in support of its upcoming Expression product line. The previous webcasts are also available on demand. Both the upcoming and previous are available on Microsoft's Event and Webcasts page for Expression. Microsoft also added a calendar view events page showing all available webcasts on Microsoft products. I don't see a product filter option for Expression specifically when rendering that calendar page.
Here are the October 2006 Expression webcasts:
Monday, October 16, 2006
10:00 A.M.–11:00 A.M. Pacific Time
Thursday, October 26, 2006
1:00 P.M.–2:00 P.M. Pacific Time
Tuesday, October 31, 2006
9:00 A.M.–10:00 A.M. Pacific Time