The Linux client for Unreal Tournament 3
still hasn't been released, but it's now possible to easily play this game on Linux. Cedega 7.1 was released this morning and it now supports Unreal Tournament 3 along with better supporting Bioshock, Elder Scrolls IV: Oblivion, FEAR 2, Medal of Honor Airborne, and Sins of a Solar Empire. Cedega 7.1 also has performance and stability improvements.
More information on Cedega 7.1 can be found on the Cedega news page