Today I heard more about ADO.NET Data Services, which is really cool stuff. The PPTX file from the Session (called "Building and consuming REST-based data services for the Web") is available for download:
WUX313_Flasko.pptx (2.59 mb)
A few 'mood images' from the 4th TechEd day...
General Session about power usage in data centers
One of the many coffee "corners" at the conference
The delegate work area
Lunch area
Public bicycles for the people of Barcelona