You will find an OpenTTD server (0.5.3) running on batfish.pepperfish.net on the normal port.
The server password is seek2Eid
There are three companies, initially their passwords are the same as their names (although if people change that, please enter it here) -- case matters.
Also, Those three are all the companies allowed, so you'll have to cooperate.
The game will only unpause if at least two players are connected. This is to prevent someone doing lots when noone else is around.