Mashable!, the only other company that includes an exclamation point as part of their name, has a nice writeup about it. The basic idea is to overlay the Million Dollar Homepage and overlay it on a map. Bebo members can by specific areas on the map to put up whatever they’d like (for a price, of course). I think it’s an interesting attempt at pure monetization of a social network, and I know Adam has put a lot of hard work into it (hell, he even dusted off his C skills). It will be interesting to see how Bebo Nation developers and if it can sustain its early momentum. Congrats Adam!