Leo Laporte and Steve Gibson have been having an interesting discussion about Windows Vista Digital Rights Management (DRM) in Episodes 73, 74, and 75 of their weekly SecurityNow podcast, including a conversation with Peter Gutmann, who wrote a white paper called "A Cost Analysis of Windows Vista Content Protection".
Today I noticed a GRC newsgroup post referencing a shashdot post discussing a Windows Vista Blog post discussing Gutmann's paper.
If you are considering an upgrade to Windows Vista, and are not familiar with what Microsoft is doing with respect to DRM in the new O/S, you probably want to take a look.