This is great news.  The session recordings for the Microsoft Office System Developers Conference are online on MSDN.  Check the link to Erika Ehrli's blog here.

Here's the link to the MSDN site.
Microsoft Office System Developer Conference 2006

This is great stuff.  The conference was max'd out with attendance, and it was in a relatively small venue, and now it's available to anyone.  Try to find some time to sleep.