I'm actually a little worried by what they will offer, controller-wise anyway. I still play PC mostly, and prefer a controller I can sit and play with, whether it's a gamepad or a mouse and keyboard. This next generation, if the simple gamepad is thrown out in favor of sixaxis-like experimentation, coud really leave me behind. I may just be a dinosaur though, as the likes of motion control and Kinect never caught on with me.
Throwing my name in the hat of people who would care. I followed Jeff and company after Gamespot because of the reviews they write. I'll say that I'm looking for game criticism in a review and not purchasing advice, and I think the Giant Bomb crew does a good job with that.
I think the original Halo, playing it through with my brother. That's just my best co-op memory that comes to mind. We played the whole thing through together in a short period of time, and then did it again on Legendary.
These days I'm playing a lot of Tribes with my friends, or stuff like Endless Space and Sins. Looking forward to Borderlands 2 a whole hell of a lot.
Speaking as an older gamer (well not that old - 27 - but playing online makes me feel ancient), this kind of stuff always makes me shake my head. Not because it's shocking: Do you really think using slurs and put downs that all end and begin with "bitch" is shocking? It's just dumb. My only advice to the girls would be keep gaming, because it'll get better. You'll find people to play with.
As someone who had to rely on a Mac for gaming for a while, I can honestly say it's very hard to find those kinda gems that exist off the reservation (away from Steam, D2D, Amazon, etc) that you find on the PC. The community is either just not there, or very well hidden. This was three or four years ago (I finally cracked, built a PC and never looked back), but for the most part I was just playing Peggle, and the closest I came to a "real" game was Eschalon.
I hope someone has a good suggestion, but I'd say you're looking pretty tapped already.