So I get that Google Wave is an attempt to re-invent a modernized version of email. But its mashup of email, documents, and social networking is kinda hard to get your head around. For me at least, this video helped:
By the way, if you're one of the 100,000 who have scored an invite—go here to try it out with your fellow Giz readers. And if you still don't know WTF the big deal is, take a look at Lifehacker's excellent in-depth review. Thanks Ben!