WorldWideHelp - join
General newsgroup and rallying point for power bloggers, wiki experts, database adepts, etc, for calls to action and volunteers to provide information post-disasters. Will also be used to exchange information in more peaceful times, so we can all learn from our experiences.
Low activity, 121 members, restricted

BombayHelp - join
Exchanging information about RELIEF efforts for the Mumbai area during disasters, natural or human-created. Anyone can join. The group is not actively moderated.
Low activity, 118 members, restricted

Cloudburst - join
Coordination group for http://cloudburstmumbai.blogspot.com/ and http://mumbaihelp.blogspot.com/
Low activity, 18 members, restricted