We just got a Wii and a Wii Fit. I'm hoping to use it as a force for good. Getting my ass off the couch for good, anyway. The plan is for me to use the Wii Fit each day for a minimum of 30 minutes to start.
The only down side I see so far is that 30 minutes of exercise takes about 45 minutes total - what with the fiddling around between activities. I'm sure I'll get used to it or find some tool in the Fit that lets you roll from activity to activity.
There's still a lot of things I haven't tried yet, the best case scenario is that the range of things to do will keep my interest. Plus it's a lot like a game. You can high score for how well and how long you do the activities. Competition!
Day 1 - set up
Day 2 - 25 minutes in the morning. I dig the Super Hula Hoop!