The Scrum Study Group Registry (http://scrums.org) is a program of the ScrumAlliance that provides a listing of local study groups for the ScrumProcess, as well as web space and email lists for those groups, and guidance on how to create, organize, and run a successful study group.
There's a Wiki for Study Group leaders and members at http://wiki.scrums.org
This site appears to be dead--the front page is blank, and the wiki is grown up in weeds and spam. WhatHappened? --TimLesher