Bob Familiar, my Architect Evangelist counterpart in New England, has posted details of upcoming events related to the arcStream initiative:  

• December 11th - arcCouncil meeting on "Composite Application Architecture and User Experience"
• January 11th - arcLab session: "Take a lap around .NET 3.0"
• There are also many arcCasts on a variety of subjects coming up as well.

More details and registration can be found at the arcStreamEast.net site.

-Chris