I just joined a group #consultants on http://twittergroups.com a very handy new group site service for people who use twitter as a microblog service. TwitterGroups is using Opensocial features to connect so if you use Google's Friendconnect you can join and share your profile right away. Friendfeed room is also there for you. I recommend people who use Twitter, check out the groups available or create your own at TwitterGroups.