I recently got the opportunity to attend Microsoft TechDays 2007 held in Paris, France. The main objective of the occasion was to gather all the events like DevDays, Student days etc and organize an event which would address all the people including developers, architects, students, entrepreneurs etc.
The event lasted for 3 days with many industry stands as well more than 250 sessions on different technologies. The event was attended by a large tech community and overall it was a great success for Microsoft. The event gave an overall view of the new trends in technology especially Windows Vista, .NET 3 etc.
I found that event really interesting and informative and hope that Microsoft would continue to organize events of that sort.