To find players:
#1 JOIN OBEY IRC CHAT
http://chat.obeygame.com
to find other players ready for a game
If you type someone's name in the irc chat, it will make their computer do a light 'blip' sound.
This is the same chat that people opening the game see in the 'Join Game' screen.
#2 Join the OBEY Steam Group
There is a chat room there where players often hang out