I found a nice UT 2004 site, and it has a FAQ page:

http://www.ut2k3.net/2k4qa.php

One important FAQ relates to talking online. I didn't realize there were so many choices of "channels". Perhaps one reason we haven't been able to hear each other at times is that one or more of us was on the "local" channel, and were too far away. Or just on the 'wrong' channel.

Lots of other good stuff there too:

http://www.ut2k3.net/powerups.php

and here's a good page on dodging:

http://www.ut2k3.net/atdodge.php

:)