Everyone in the world wants a Google Wave invite. 9 out of 10 have no clue why they want Wave in the first place (I am the eighth one in that ;) )
Its just the hype of limited invites that did the trick I guess - kind of online Macguffin.
Half an hour into using Wave, I feel that its like enhanced Google Docs with chat, having iGoogle interface. Not at all sure how its gonna be useful to me. The reason why I actually wrote this is not to "review" Wave, but to share something interesting. Like all beta products from Google, here is a nice error page. I could not find this image anywhere on the net, so I can proclaim like the 24/7 news channels - you saw this first here! :)