Unreal Tournament 3 maps work on the PS3, but they've taken it upon themselves to pick one from the PC community and "cook" the code so it could work on Sony's box. Players can now download DM-Shrine, made by English graphic designer Thomas Browett, here or here.
The directions for getting it onto your PS3 (which we've lovingly placed after the jump) are not exactly user friendly, but shouldn't be too big of a hurdle. The one issue is that you are going to need someway to get it onto the system, either via a memory card or a USB memory stick. We know we're not game designers, and we think free content's great, but is there really no more elegant way of handling this?