VSTS Activists is a focus group committed to the mission of learning how to use Visual Studio Team System and Team Foundation Server to enhance development processes and practices.
An elaborate introduction can be found here
http://community.sgdotnet.org/forums/t/11872.aspx
Group activity is centred around physical gatherings, carrying out practical sessions to configure and apply TFS in simulated team environments. The core intention is to bring together similarly motivated individuals to teach and learn from each other, thereby accelerating the pace up the learning curve which would usually be very steep otherwise to tackle alone.