Extensible Messaging and Presence Protocol (Jabber)
Email has allowed us to connect and communicate knowledge, and now IM is poised to let humanity connect and communicate people, to virtualize what we do in the real world but limited to just those around us, and to open that up to anyone anywhere and enhance it as well.
The idea behind Jabber is to ensure that the technologies to do this are open and available to anyone, and not controled. I don't care what the technologies actually are (XML and TCP are just tools, some of the best we've got so far to get the job done) just as long as they help people connect and can be built on and extended by anyone to evolve to relate more of what people need to connect and converse. — Jeremy Miller