I have GOT to get me one of those...

Apple + Nike
Two great brands, both kinda industry leaders - and look what they've come up with now... a pair of shoes that can talk to your nano (wirelessly, of course), keep track of your workout, sync with a custom designed nike-personal-workout-planner-type website ... and yes, it still plays tunes!

I love the 21st century :-) ... see the real thing here...