Jeff Prosise from Wintellect has posted some training videos on ASP.NET 2.0. Of the things covered are Web Forms, State Management, Security, Master Pages and Site Navigation, Data Access, and Application Infrastructure. If you aren't too familiar with ASP.NET 2.0, these might be good to check out to get an overview of what is new.
Read the complete post at http://www.dotnettipoftheday.com/blog.aspx?id=174