i do love that sort of thing, i used to play Quake and UT on the PS2, never played it on the PC.. but it was faster than normal FPS's on the PS2 thats for sure..
i do like a good reaction shooter, my fav map on CoD4 is shipment with shotguns, its just fast and fun, no thought (not much) ..just fire if something moves.
so you get the mod creator with the PC game then? because ive seen this site for the PS3 mods..
http://www.ut3mod.com/
im sure theres are other sites out there, but this one looks good, and seems like its a ps3 download friendly site.
imo this is the future for fps's. i know that certain genre of games like Cod or MoH etc.. will always need to be built by the creators as they will have the time and the know how to make these maps incredible
But look at RFOM! i mean, i do love the new maps, and i will always buy them as long as i play that game, but from what i have heard, these maps that people are making for UT3 on the PS3 are as good.
i cant comment as i havent played them, and i probably wont play the modded maps until i know what im doing. but its certainly good news that people are churning out good stuff rather than rubbish in these early few months.
ps.. last time i played Unreal T.. there was a circular disk-saw type of gun... is it still in the game? i havent seen it in previews, but i was my favourite back in the day.