Atlas sounds promising. One of the reasons I didn't get the Nike Fuelband was because some reviews said that, being on your hand, it wouldn't log too much information if you are doing stuff like walking on a treadmill.
But if Atlas could track something like that, it would be really cool.
Whatever Apple is going to announce, it can't come soon enough.
On another note, when Hsieh handed in his papers to say he was joining Apple, Atlas Shrugged!