Vice President of the Developer Division, Somasegar, posted a blog about architecture tools in Visual Studio 2010 including some interesting dependency graph screen shots.
So to follow up on that I have posted a new Video (WMV or MP4)on Beta 2 bits that demos how this dependency graph feature works in more detail, and the video is a lovely big HD resolution (1280 x 720) so you can really see what's going on.
When I show this to customers the reaction I get is excitement followed by "finally, I can see the big picture" of my code. Customers often find big things to improve in their code in the first 5 minutes of browsing with this tool.