In case you missed it, Visual Studio 2008 Beta 2 along with the .NET Framework 3.5 is out.
My favorite way to check out versions of Visual Studio or any major beta software for that matter is through a pre-built VPC. I have found them over here. You have to download 8 files (2 executables and 6 .rar files), you run one of the executables and it creates a nice VPC you can use with with Virtual PC or Virtual Server. It certainly makes a lot less work by not having to install all of this software and it also keeps my system clean.
I downloaded all the files, ran the executable and had my VPC up and running in only a few minutes (after the long downloads but who cares).