Glad the KB/Mouse thing is still happening for the PS3 (no word on 360 yet), I hadn't heard it mentioned for a long while thought it may of been cut but looks like its still in there. Not sure about balancing but at least you can choose to play against keyboard and mouse or just controller.
More details to come later.
http://utforums.epicgames.com/showthread.php?t=574996
Folks,
I checked with Steve Polge and he said that YES we are supporting keyboard and mouse in Unreal Tournament 3 on PS3. He is confident we are doing it in a way that will be balanced without feeling "gimped" for either side. We'll also allow people to choose whether or not they want to allow mixed controller vs. keyboard/mouse games or not.
I think you guys are going to love UT3!
More details to come later.
http://utforums.epicgames.com/showthread.php?t=574996