Eric Carter kinda announced it ... Visual Studio 2008 Beta 2 is available as of today. He didn't get into the details on where to go and get it, so I did some searching myself. It's easy to discover where it is if you just go to the Microsoft Downloads and search for Visual Studio 2008 Beta 2:

Click here to do your search ... notice there are alse new Silverlight Tools available for Visual Studio 2008 Beta 2

Enjoy!