I got a Wii at Christmas - it came bundled with the basic sports package, which is pretty gentle. A couple of weeks ago, my daughter brought over her Fit+ game and balance board so I could try it, and I agree that it is great.
This has the advantage (over other video-type games) of being able to get toned-down to whatever level you are able. So for those of us who have limitations, there is still plenty to do and things to accomplish. I am going to go out and invest in my own.
Hats off to Nintendo for recognizing that we are not all 17-year-old skateboarders anymore.
Mike