This is what I'm watching right now:
UML with VS2010 on Channel 9
More info on MSDN: How to: Create UML Modeling Projects and Diagrams
Visual Studio 2010 offers higher level modeling tools which integrate with Team Foundation to provide strict rules for how a project's layers and structures are built. This is in addition to reverse engineered sequence diagrams and the class diagrams which already existed in the vs2008.
Also on my catch up list: Tour De Flex, catching up on Adobe's infrastructure which is very similar to how WPF works.
One more, SCRUM in VS 2010: here, Wikipedia's description of SCRUM, here.