Wii Workout

Is anyone else out there a little worried about having to use the new Wii controller? I mean, I, like many gamers, am not in the most physically fit condition. I'm wondering how many calories I can burn by playing video games! This will change the world of gaming for younger gamers whose mothers give them a hard time about getting exercise! I think it'll take a lot of getting used to. My arm will probably feel like it's going to fall off after an hour of playing the Wii.