FYI, it doesn't go cross platform for AT LEAST a year.
Any stupid kid that would potentially play this is already dancing naked on a mailbox in WoW begging for gold. You have nothing to worry about.
Using the messenger pad from Microsoft will be all the keyboard you'll need, and it is a hell of a lot easier to use in your living room that a keyboard/mouse.
EDIT: Also, there is no PS3 version of this game coming out. Ever.This comment was edited on May 15, 17:32.
Life is sexually transmitted.