You've got options if you want to get your Meat on, though. The Steam version of SMB will be hitting the last week of this month, and of course, the game is available over Xbox Live Arcade right now.
Other Brad really dug SMB, giving it a five out of five stars in his recent review. I've no comment on SMB, though I am willing to say that calling the game "hard" is an understatement. I would begin fearing for the integrity of my dry wall and my cats' faces if I were to continue attempting to beat the level that I'm stuck on right now, just so that I, too, could tell you that the game is awesome.