[roc]

Some different protocols do different things. But XMPP, particularly wrapped in the Wave implementation, can do many, many things.

Wave might catch on as little more than an open-source alternative to, say, Sharepoint and Biztalk. (collaboration and workflow automation being the most obvious non-communication uses).

But I don't see why people would stop short and not replace their SMTP/Jabber/IRC/RSS use with Wave once they and everyone they need to work with is using it.