That might actually be useful for bike riding etc.
One neat little MP3 player I use at my gigs is a Digisette, which is an MP3 Player in the shape and form of a cassette. My car only has a factory cassette deck in it and this thing sounds great. I keep my break music on a SmartMedia card that goes in it and since the Digisette stays with my car I am less likely to forget to have some break music with me. These have been out for a few years and were sold by Radio Shack but I think they are slowly being discontinued.
http://www.digisette.com/