Pretty soon you'll be able to add Facebook 'friends' to your friend list on Battle.net for a few rounds of Starcraft 2, or whatever else you should desire.
It's no secret to anyone who knows me (though I never mentioned it here) that I'm not a fan of FB, but this is a pretty good idea- not that I would ever be using it, since
- I don't have a Facebook page and...
- I really don't play all that much stuff online
Adding friends to my lists from Facebook... maybe I would- uh, nah.