Eh, it's fine. I was mostly just posting to note that it sounds like it could be fun, but would be more effort then I'm willing to put in to get to a place where I could do it(closest school with a track I know of is two miles away. Straight downhill, which would make the return trip some kind of not fun at all). I walk 3 miles every weekday anyway, have been doing such for a couple years now, and will continue to do so.
Though this reminds me of the DS Walking Coach thing a freind of mine was talking about last year. Comes with a pedometer, and you just carry it around to see just how far you walk, then sends the information back to the "game" where you've set goals and such for yourself. I don't remember most of the details, but I remember thinking it was interesting when I heard about it.