I can't vouch for the full history of it, but when I got here in 2004 the chapter was well-established. We had an Onslaught server and some of the people played UT99 Invasion. I was into TDM and for a while, when the Team Warfare League ladder was the "place to be" within the larger community and there was still prize money to be won in UT tournaments, we fielded a 2v2 team. It was an attempt to get more TOJers into the non-vehicular modes and introduce them to the thrill of competition.
We did quite well for a while, but with a series of team losses due to other commitments (Killerah left for school and missions work, Shagz was very busy with work and DJ commitments, James left to focus on his martial arts, and ColdSteel was still on dialup at the time) we had difficulty reliably fielding a team on match nights, and after a string of forfeits we put the team on indefinite hiatus. I started focusing more on solo dueling and my other competitive teams with Lordz of Brooklyn, and after my first few years of college, and the disappointment that was UT3, I too found myself with little time to focus on gaming and quit. I still putter around on Quake Live occasionally, but I've never had the time to make a full return to my One True Gaming Love, UT2004.
After the competition team folded we did maintain a DM and TAM server for a while, but I ran out of funds and had to shutter it as well.
I think at the height of UT2004's popularity we had about a dozen members with varying schedules, so that we never *all* got together at once to play. Prime time weekday nights, we'd have maybe three or four people on at a time.