I received my Google Wave invite today.  Woot!  This could easily be the next big thing since e-mail and the web browser if it gains enough traction so that everyone uses it - implies ISPs, corporations etc. are hosting wave servers like they host e-mail and web servers today.  

Its currently in beta and I'm looking for people to "wave" with.  I have invites which I'll reserve for colleagues and friends I interact with often.  Friends and colleagues, drop me a line if you would like an invite.

Some links about Wave: