Just got back from PDC 2008 last week, we showed all kinds of cool new stuff. Here is a list of links for the videos of all the ASP.NET sessions:
ASP.NET 4.0 Roadmap - http://channel9.msdn.com/pdc2008/PC20/
ASP.NET MVC: A New Framework for Building Web Applications - http://channel9.msdn.com/pdc2008/PC21/
Microsoft Visual Studio: Web Development Futures - http://channel9.msdn.com/pdc2008/TL48/
Web Application Packaging and Deployment - http://channel9.msdn.com/pdc2008/ES15/
ASP.NET Dynamic Data - http://channel9.msdn.com/pdc2008/PC30/
ASP.NET: Cache Extensibility - http://channel9.msdn.com/pdc2008/PC41/
We also released new preview bits of Dynamic Data for PDC. You can check out the new bits from here: Dynamic Data Preview 1.
I’m also excited that David Ebbo has blogged an early version of support for many to many relationships in Entity Framework for Dynamic Data. You can see grab the code and use it with today's Dynamic Data. You can view the post: HERE.