Been having a blast here with ~100+ people on at night never have a problem finding groups in seb or HS. There was even an open PoHate raid last weekend.
here's the getting started guide
http://wiki.takp.info/index.php?title=Getting_Started
with a 1 link download for the client.
Don't let the ability of others to box discourage you from joining. I've seen a rogue so far level himself up to 49 by being LFG. And a solo box ranger who has epics now.