So how does the average person find out about wave - let alone learn all the terminology, how to use it, etc etc. We're only hearing the geeks feedback so far, because the rest of the world doesn't know/care it exists. I'd be interested if you have some examples of communication forms that geeks didn't start using first - email,sms,twitter, were all pretty geek lead...
I think the average person won't see how this solves any problems they have - facebook,twitter,email,sms all work pretty well for communication.
I can see your point about teams working together - business collaboration - I can see it making some inroads there.
Lots of the things I hear wave does are technically fun, but in practice, horrible design choices - showing text as people type it was the norm 20 years ago. Since then, we've pretty much all agreed it's irritating and not really useful.