I had the opportunity of attending the TechEd 2006 at Chennai. That was great rocking TechEd. However, when compared to the previous TechEds, I felt the liveliness was missing. More so, could be due to that instead of a live keynote session, this time they had a video played which didn't help to kick start the enthusiasm.
The Architect track sessions were more in a Business Process perspective, had little of technology. I request the oprganisers to please note that architects in India are techies who love to understand the new technologies and use them in their solutions. And due to this, the people who had registered for architect track, actually attended the developer track.
WinFX sessions where good. Mostly they were kind of introductory sessions rather than deep dives, except for the session on WCF by Gaurav Khanna. His session on CLR hosting was an eye-opener to understand the way CLR worked and how to extend the CLR capabilities in v2.0.
The security sessions by Vineet Gupta was very useful in the sense, developers got an idea of the things they could do out-of-the-box to aid security, showing security is not something outside the app, but something that runs through the app from the presentation layer to the DB.
For people who missed the TechEd 2006, you could get the presentations downloaded from http://www.techedindia.com