Microsoft have release Visual Studio 2008 early (wow, is this a first).

Also available are the team editions and Team Foundation server of the professional, Team and Express edition is now available.

A 90 day free trial for non-MSDN subscribers is available at VS2008 trial 

For more information review Scott Guthrie's blog article - Visual Studio 2008 and .NET 3.5 Released - ScottGu's Blog

Enjoy and experience the new features of Windows Presentation Foundation, Windows Communication Foundation, Windows Workflow, CardSpace, , Silverlight, Ajax Extensions and many many more new features.

Again, for details of what is included within VS2008 see ScottGu's Blog.