So you want all the people in your org to chat using twitter, but you don't want that chat to be private? Use yammer. Only folks with an email address inside your company (ie: producer@orlandofringe.org) can both post and read your messages. It's a twitter-like way to stay in touch with folks in your org. And it works, just like twitter, on your phone, computer, IM and every other way you can think of. Watch the demo video. It's super-short and explains everything.