Since you can copy a track from a midi file and put it into a pad, I believe there is no end do what you can do with the Pads.

Listen to a song (midi file) then pick out the parts you find interesting. A drum break – a trumpet solo --- a guitar riff ---whatever.

It is a little involved, this would be a great subject for the 2007 JAM.
My keyboard became 60% more interesting when I learned how to use the pads.

John C.