Didn't see this in the search so... :
Always nifty to see the crazy things people decide to do with thier things. Here's a NES controller converted to an Mp3 player. This is even wired to use the Start button as power, the Select button to change player options and the D-pad is Next/Previous track and volume. A pretty small mod in the big picture of what some people can manage, but still pretty cool IMO.
Here's a link to the site. It's in German so you may want to cut and paste into BabelFish first:
http://www.futurenews.at/archives/82...P3-Player.html