Reposting

Ohh, and I know I shouldn't repost things. Especially not things I link to (if you're not reading the stuff that I've linked to in the side bar, you're missing out). But this is just too good to pass up.

Here also, linked from wired.com, via lifehacker.com, is something for you (I want to say "us", but I'd be lying) fitness freaks.