There were two releases today that are guaranteed to make Unreal Tournament 2004 fans happy (especially if they run Linux).
First off is the long-delayed 3204 Linux patch. Download and install it ASAP. Bugfixes and performance improvements abound, by all accounts.
Second is the Community Bonus Pack 2 (available here, amongst other places). This map pack looks incredible and I’m looking forward to playing all of the included levels.
You can see some screenshots on this Atari Forums thread.
See you in the game!