We had a great time at PDC last week. Lots of interest in StreamInsight at the SQL booth and good attendance of our talks - even the last one, which was scheduled in the last possible slot of the conference. People stayed until the end and asked excellent questions, showing that they understand StreamInsight and its potential.
The talks are online, and - unlike TechEd sessions - apparently viewable for everyone:
Moreover, Streaminsight was demo'ed in Building Location Aware Applications with the SQL Server Spatial Library
So, before you head out and enjoy today's traveling, download the videos and slides and kill some time on the plane!