If you are doing any work with any of the following technologies:
- LINQ,
- .NET 3.5 (C# 3.0, VB 9)
- WCF
- WPF
- WF
- CardSpace
- Silverlight
- ASP.NET Ajax
- .NET Compact Framework 3.5
- VSTO 3.5
- Visual Studio Team System and Team Foundation Server
You should download the free Visual Studio 2008 Rhythm Training Kit (125MB). The training kit contains 5-days of technical content including 20 hands-on labs, 28 presentations, and 20 scripted demos.