Talk to MySpace. I hear it's popularity is pretty low nowadays.

Facebook isn't permanent. It's the new new thing. Once it's popularity is over, it will die. Look at GeoCities, maybe you are too young to remember it. It was the big thing back in the day, too. It finally was shut down last year.

Intergrating a website into a game that is a fad is a bad idea. When the website shrinks down or flat-out closes, you now have wasted time and programming for that site. The functionality will eventually cease to work.

People are already have a huge fit over the Real ID implementation in StarCraft 2. If you want to talk to someone across game, you have to add them as a Real ID friend. Then they can see your full name, and your email address. And you can see all of their Real ID friends, and they can see you.

Now, as someone has already posted on the StarCraft 2 message board, watch if Real ID is linked to the Facebook integration, Suddenly you have alot of people knowing alot of other people without actually knowing them. You want your friend and his 100 other friends to know your full name and potentially your email address?