...are you are correct, it was under "games we wish were on xbox" Unreal Tournament 2007 is also under that catargorie which makes me angry, thats my second favorite game probably!
WRONG straight from the offical site
Is Mercenaries 2 exclusive to the PS3?
Mercs 2 will be available on the 360, PS2 and PC, in addition to the PS3.
From what I hear the game will be set in Venezuela which is invaded by a tyrant who wants the oil there, Ramon Salano, all the characters from the previous game will be playable- Jennifer Mui, Mattias Nilsson, and Chris Jacobs.
Destructable enviroments, advanced AI, the ability to swim now, and you can start your own military company and recruit your own mercs.
Lots of other features...it should be out in February on the 360, PS3, PC, and PS2.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem