Here are some platforms where Appropedians gather to work.
BetterMeans
Our BetterMeans workstream is for task management. Substreams are listed on that page. The dashboard is the best place to see all tasks.
StatusNet
(Just set up, to try out - at least I'll use it for my own notes in tagged form, but I'm hoping others will also use it. --Chriswaterguy 18:03, 3 March 2011 (PST))
Appropedia Workspace on StatusNet - this is a microblogging platform, with groups (e.g. funding, tech, service learning...). You can follow users, join groups and send messages from any Identica or other StatusNet account, but if you use it a lot you'll probably want to set up an account directly on this site. Local accounts are currently set to allow 300 characters per message.
"Context" links allow conversations to be tracked easily.
You can have posts automatically feed to Twitter. You can use Twitterfeed.com to post your feed (including a filtered feed option) to Twitter, Facebook, other StatusNet accounts.