There is a very nice training kit (which I'm using quite a lot) about the new Visual Studio 2008 and .NET Framework 3.5. It covers most of all the new .NET 3.5 features, like WPF, WCF, Workflow, Workflow-Services (SILVER), LINQ, C# 3.0, ASP.NET AJAX, VSTO, CardSpace, SilverLight, etc.
I beleive it's been created/delivered by Microsoft DPE. 🙂
You can download it from here: