There have been a lot of great sessions here at MIX07. To compliment those sessions, there has been some great blog coverage as well. A great post is this one from from Scott Hanselman, that puts things into context quite nicely.
Look for this session to become available for download and streaming soon. Also, Stefan was kind enough to upload both the slides and source to his mix sandbox (I wish every session did this) before the session even began.
Here are the links: