Google Wave.
While Microsoft was off reinventing the search wheel (in much the same fashion as it reinvented the portable music player wheel, by adding angles and unnecessary jangly bits), Google was off in Australia doing the foundational work for Google Wave.
The Rasmussen brothers, who brought us Google Maps, are heading up the dev team on Wave, and it looks spectacular.
There’s a demo video at wave.google.com. It’s about an hour and a half long… so… you kind of have to commit some time to it, but… it’s really spiffy. It’s a collaboration tool that seems to have almost boundless potential.
Take a little time and watch the video. It’s bitchin’!