So a few of us here played through Alien Swarm a while back. A new version has come out with 8 player support! Seems to have gone undetected by moi since it's release in April. If anyone wants to get into some co-op, post here!
I played through a few mission with my brother. Seemed to be the same missions that I remembered from the original. I think there is other campaigns to run through though. Was only 3 of us though, wouldn't mind having a few more people.