What are we going to co-op next?

Alright. Have we assembled? Check. Are we actively posting and communicating? Check (Well, three out of five :P). Are we gaming? Like it needs to be said. Check.

Sooooo, what do we all need to get for some great co-op play together? I've heard rumors of L4D2 arriving at Gaicha's and Kinto's for...PC? Is that confirmed? Unfortunately my Borderlands is for PS3, so I can't hook up with your PC version.