I like the idea ... I'll probably get lambasted for this, but I think it's something that would work well built on top of Twitter. That would make it easy to ke

I like the idea ... I'll probably get lambasted for this, but I think it's something that would work well built on top of Twitter. That would make it easy to keep tabs on your family/friends, plus it might have more potential to get viral. My thinking is that it would work well with a game/challenge aspect to it ... earning points, trying to keep up with a friend, beating your mile time, etc. Good stuff ...