The TechNet SoftGrid site is live, check it out at: http://www.microsoft.com/systemcenter/softgrid/default.mspx and learn about application virtualization including:
SoftGrid is a core component of the Desktop Optimization Pack – designed to increase desktop manageability and decrease application TCO.
Instantly gain all the benefits of application virtualization, on-demand delivery, and software self-service from within the SMS infrastructure.
Consolidate servers, increase utilization, eliminate compatibiltity testing and siloing, and dramatically improve your Terminal Services ROI.
I don't see a SoftGrid community listed there yet, but watch this space: http://www.microsoft.com/technet/community/en-us/management/default.mspx