Well, usually Linux ports can be found 3 or 4 months after a game is released, although that isn't always true. As much as I like Linux (even though I have no clue how to install stuff to it... I even have a "For Dumbies" Book) it just isn't for gaming. Also, if you're into Unreal Tournament you won't be able to make your own maps because there currently is no editor for it and supposibly there will never be.
Member,
~ Spdstr