Make sure that you check out the list of webcasts for .NET 3.5 at http://www.microsoft.com/events/series/msdnnetframework35.aspx?tab=webcasts&id=liveall.
There are several webcasts scheduled for this month by a bunch of good speakers.
Read the complete post at http://www.grokdev.com/Blogs/scott/2008/07/03/NET35WebcastsForJuly.aspx