Resharper 4.0 Beta which supports C# 3.0, LINQ and Visual Studio 2008 is ready for download now! This is THE best addin for Visual Studio and I would recommend it to everyone who uses Visual Studio 
Here is an article which compares Plain Visual Studio 2008 Vs Resharper 4.0 Visual Studio 2008
You can download the beta here
Enjoy! 
