The Few. The Proud. The Golden.
For the awesome people who wrestled all thirty six potatoes from the grasp of GLaDOS.
Or if you just scored 36/36 potatoes on the Valve ARG for Portal 2.
If you would like a group invite, leave a comment on Yatterman's Profile. Make sure you have a golden potato next to your name, otherwise you aren't being invited. No, you can't obtain them anymore.