http://kotaku.com/355539/spore-launches-in-september
SPORE
In case you don't know what SPORE is, you basically start out as a single cell organism and grow. As you grow, you add body parts and depending on what you add and where you add them will also decide the fate of your organism. If you evolve enough, you can travel through the planet and then outer space to visit other colonies and either live with them or destroy them.

I've heard about this. It's sort of like a quasi-MMO, isn't it? What I remember is that your 'planet' exists in the multiplayer universe with other players' planets, but if you destroy their planet, it doesn't actually affect their instance of the game.

Anyhow my brother will be excited, I'm sure.

It is MMO in the sense that you play on-line and you can decide if you want to destroy your neighbor or make friends with them. One of the more interesting parts of the game is that you decide what kind of body parts your organism gets and where they go.
Here's a clip of someone making a creature:
http://youtube.com/watch?v=V5TXEUiR1Xk

Finally! I was worried that this thing would be outdated by the time it was released, but it still seems to be fairly unique. Brian Eno did the music, is that right? Farewell Sim City. Hello Sim Universe!

i cant wait to feed this game to my new mac - been waiting on this game forever - gonna be so unique and fun for a long while i expect!

From what I've heard, there aren't many bugs when this is released...but I wouldn't count on it being bug free. Dev did a lot of tuning over the past year so the game is pretty much done.

The Long Now Foundation hosted an interview with Wright and Eno last year at which they demo'd the game. It looks like a blast. The demo isn't the completed edition of course, but you can get an idea of what gameplay will be like: VIDEO