Lobby Server
Feel free to use the lobby server any time you want, don't distribute the RCON password though.

IP: 85.236.100.18:27315
RCON: eOHrDGovIH

There is an FAQ on the TF2 Center website about how to set up the server although it is pretty straightforward.

Mumble Server
Theres a private mumble server availible if you want it at. Its not a big deal if you invite others on.

IP: 37.123.114.146:5424
PWD: hue

eTF2l
Join this
http://etf2l.org/teams/20792/