There is a new TechNet Chopstick available: Exchange 2010 Preview.
“In this screencast Ilse van Crieking (MVP Exchange) will guide you through some of the new features of the next generation Exchange 2010 server. Note that this screencast is based upon the first beta and some of the features shown might be subject to change.”
TechNet Chopsticks is a webcast platform (based on Silverlight) from the MSDN and TechNet teams in Belgium. It has all kinds of technical stuff, provided by Microsoft employees, MVPs, User Groups and content from other events like TechDays.