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...
This is from May 2006, but remains a good self-guided walk through of the Expression Suite as of the May 2006 CTP. The virtual lab tour allocates 90 minutes for you to explore the applications over the internet without having to install them locally.
Microsoft has almost 200 minutes of training video content to help people get started with the Expression line of tools. The training content complements the demos on the Microsoft Expression site. Update (December 26, 2006): The early video training...