A very interesting article on what XMPP is really capable of. Sounds like something every technology company should at least know about, if not think about how communications could well change in the near future.
Google Wave: You need to pay attention to this.
So here's the deal with Wave: If you deal in technology, and you get this one wrong, you'll miss the boat. And it's a big boat. If, on the other hand, you get this one right, you have the potential to do some incredible innovation.
In a nutshell, this is the next revolutionary leap in Internet application architecture. Maybe the first truly revolutionary leap since HTTP itself.