What about CDs with those sneaky tracks before track one? Those really creep me out and I can't figure out how to rip them. I believe the Willie Nelson tribute "Twisted Wille" has one, one of the albums by "Mono Puff" has one... and I think TMBG's "Factory Showroom" includes one as well. They only seem to work on audio-only players and you have to rewind from the start to hear them.