Official Secretary Flare says:
Here to join the bookworms? Great!
To join the TF2 team, here's what you need to do.

After that, find your way to our roster on Google documents. https://docs.google.com/spreadsheet/ccc?key=0AlFF2Y4i389RdDIycXRyWUZIdHdXLUlRbi0waXJWeWc
Sign your name in the rows for the class(es) you wish to play for us.

THEN SHOW UP TO PRACTICES AND PARTIES AND BE FRIENDS WITH US YAAAAAY!

Further, individual tourney rules occasionally change- however, we are currently running the UGC ruleset for items. Can be found here:
http://www.ugcleague.com/home_tf2h.cfm

We also use Mumble for chatting. We chat on the MLPTC Mumble server.
Mumble IP: 208.167.232.2 Port: 10026
If you're looking to play competitively, you NEED A MICROPHONE.