NEW MSDN Video Series: How to explore unfamiliar code in Visual Studio 2010 Ultimate
From the announcement:
These videos show how you can use code visualization tools, such as dependency graphs, DGML, and Architecture Explorer, to help you understand what's going on in unfamiliar code:
•What are dependency (DGML) graphs?
•How can I use dependency graphs to visualize code?
•How do I manage large dependency graphs?
•How can I use Architecture Explorer to browse code relationships?
•How do I edit and customize DGML graphs?
•How can I visualize run-time object graphs?
Here is the blog that announced them.