Because from what we've been hearing, New Super Mario Bros. Wii is no cake walk, especially in multiplayer games. Nintendo was nice enough to pass along some pre-release tips in video form, strategies that will definitely come in handy.
While watching the creative use of Penguin Suit-spawned ice blocks and synchronized butt stomps, try not to think about the lack of online multiplayer in New Super Mario Bros. Wii, a missing feature that would really help out lone gamers like me.