I have owned an exercise bike, an elliptical, a treadmill, and a weight set, and I can honestly say the best exercise equipment I ever bought was my wittle Wii
Believe it or not, the games I find most useful for exercise are NOT the games like Wii Fit or My Fitness Coach. Games like that end up in the same pile as my other exercise equipment. The games that are most effective for me are games where I'm "tricked" into exercising

Here's what I think is pretty helpful list of
Wii Workout Games you may find useful.
Its a good reminder that there's life beyond Wii Fit! My favorite is Dance Dancer Revolution. Another good one is Active Life Outdoor Challenge. A great rhythm game is Helix (downloadable as Wii Ware). This is not to say I don't use games like EA Sports Active, but mixing it up with other games really keeps a good variety, something which I need, as I get bored very easily
Happy Wiiing!