After six weeks of owning the damn thing, iPod tells me its most-played song is Cheryl Lynn's "Got To Be Real."
Some things I just don't need to know.
UPDATE: In what I think must be an act of contrition, iTunes just decided to play "Go Down Gamblin'" very, very loud.
My most-played track is actually a sound clip from the South Park movie. Specifically, the bit with Bill Gates.
Googling for movie sound clips and mixing them into the playlists can be a lot of fun.