"It is a web-based service, computing platform, and communications protocol designed to merge e-mail, instant messaging, wikis, and social networking. It has a strong collaborative and real-time focus supported by extensions that can provide, for example, spelling/grammar checking, automated translation among 40 languages, and numerous other extensions."
AND it's open source.
I watched that entire 90 minute preview/demonstration.. can I please get an invite?
I finally got an invite... too bad I don't have anyone to wave with.