Alternatively, if you fancy getting your hands a bit dirtier, do what
I'm doing, and use a PIC, with a MAS3507D mp3 decoder chip.

        http://www.codepuppies.com/~ben/sens/pic/mp3

A bunch of people are doing similar projects - there's a list of them at

        http://spectsoft.dynip.com/mp3tech/index.htm

Cheers,
Ben