Wow, that were two impressive days. There are so many ways that partners are extending Visual Studio, it is really inspiring. My presentation was one of two about how to Extend TFS. The conference ended by a bunch of partners getting 4 minutes each to present their solution: T4 Editors, testing and performance tools, game factories, controls, etc.
Are you interesting in VSX, check out this site and this book, that was handed out at the conference.
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.