Expose And Consume Data in A Web Services World: ADO.NET Data Services, LINQ, Entity Data Model
Pex: Automated Exploratory Testing for .NET :Pex is a tool being developed by Microsoft Research which has the potential to dramatically improve the quality of software testing while requiring minimal, if any, effort on the part of the developer. From a parameterized unit test, it automatically produces a traditional unit test suite with high code coverage. In addition, it suggests to the programmer how to fix the bugs. Watch the Channel9 video!

Cloud Computing
SQL Server Data Services (SSDS)
Cloud computing with Amazon Web Services

Overhauling websites using AJAX
Thinking XML: Firefox 3.0 and XML : The popular Web browser offers more to XML developers each release and the new 3.0 is no exception