If the servers didn't just crash, I'd say right now!
I'll shoot you a friend request over live right now. Then I'll keep an eye out for you and make sure to get an invite sent your way when we are both playing. (The only way to accept the invite is if you are in game at the time of the invite.) If you have a tight schedule and are only able to be on for a certain time, just let me know and I will be sure to be on at the same time.