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