I have almost beaten Medal of Honor, Heroes 2 on the Wii. Graphics aren't the Wii's strong suit, think early PS2. But the controls are easy and the game is fun addictive.
My wife wants me to finish the game so we can get back to tennis and bowling.
The bowling game on Wii Sports is EXCELLENT. I bowled for over 25 years until I couldn't stand the atmosphere any more (averaged around 180, before synthetic lane surfaces and polyurethane balls). I love the sport though, and the Wii comes as close to real bowling as anything I've ever seen.