The Brotherhood servers are nearly dead...or they were at the time I was on. Not surprising considering it's age and the fact there's been another Assassin's Creed released since. I tried to get in a game for almost 20 minutes with no luck. I was about to give up, but suddenly I got an invite from some random player. After about 4-5 rounds, the room dispersed. I tried to find another room, but had no luck. I gave up and played Mass Effect 2.