So... Google Wave. This changes everything.
Finally got around to watching this. If Google’s Wave takes off (and it will), it will change everything. This is better than email, better than IM, better than a personal wiki. Within months of this going live, we will have a million new ways to communicate. That they’ve made it open source makes it more likely than any other tool to change how we communicate via the web.
I won’t write up what it is, because you either already know, or can read about it at Mashable or Techcrunch