http://webchat.quakenet.org/
Channel: #ff.pickup
Once there, you can type !add to see if there is a pickup started and you would like to add to the pickup. Most of the time there is but one pickup going on at a time, so if you see a bunch of people in a locked server, chances are you will have to wait till it is over before being able to add yourself to a pickup.
You can, however join the server while people are in it as everyone knows the password by now, just make sure to stay in Spectator mode as you don't want to interrupt a live match.
I hope this helps!
