Here’s a catch-all device whose time has come. It’s an MP3 player that is also a pedometer and just happens to be waterproof.
It’s from Oregon Scientific, and 1GB of music space, and an FM tuner as well.
You can keep track of how long you’ve walked or run, of course, and you can even take the player underwater, without fear of damage. Headphones come with it, and they are waterproof as well.
It’s a steal at US$190.