LINQ to SQL Debug Visualizer was removed from VS 2008 Beta 1... if you use LINQ to SQL you know how useful it is to examine generated SQL code from LINQ statements as well as returned results. but it was removed from Beta 1 and still missing in Beta 2...
Now the good news :) There is way to install it back. But this is not all. You can download the source code and make changes (if you want) or just examine it. I guess there are no doubts who posted it :) - Scott Guthrie wrote a post with full explanation what is LINQ to SQL Debug Visualizer, how to use and how to install.