Yesterday i received an invitation for the Groove training on sunday 3th of June.
For all Teched Attendees this is free to join.
Just go to the link below and mail abbottl@microsoft.com to register.
I think personally that this is a great opportunity to get to know this new product and what it can do for you.
http://blogs.technet.com/groove/archive/2007/05/10/groove-fundamentals-and-infrastructure-training-at-teched.aspx