Wanna get started on Visual Studio 2008 & .NET Framework 3.5,

You may want to look into the following resources to help you learn up the new features in Visual Studio 2008.
1. Visual Studio 2008 Rhythm Training Virtual Image: 
    You can download from here.

2. Visual Studio 2008 Training Kit:

    This training kit includes presentations, hands-on labs, and demos, which help you learn how to utilize
    the Visual Studio 2008 features and a variety of framework technologies including: LINQ, C# 3.0, Visual Basic
    9, WCF, WF, WPF, ASP.NET AJAX, VSTO, CardSpace, SilverLight, Mobile and Application Lifecycle
    Management. You can download from here.