With the successful Wii Fit just celebrating its first birthday, Nintendo is ready to debut a new fitness game to the world by February of next year. Walk With Me! for DS portable gaming devices makes walking fun by allowing players to gain points for each step they take.
How it works is that the game comes with two small pedometers that are intended for family members to carry around in their pocket or bag every day. At the end of the week, all you have to do is point your pedometer at your DS and it will tell you how many points you've accumulated. You can also play against people in other countries with the social activity platform. Just another way Nintendo is helping people get fit while having fun.

I think this is a great idea for hefty families that are not already active. I wonder if this would have a greater appeal if points could be used to buy stuff in Animal Crossing... something more applied, even if it is virtual.
1