Bet you never thought of this. With a little (ok, sometimes a lot) tweaking, you can download subway maps, or Merriam-Webster’s pocket dictionary to your iPod, use it to track your running progress, find dates (yes, find dates), and best of all, play Doom! The Doom thing requires that you wipe your Apple firmware and install Linux, but Doom, you get to play Doom. Naturally, being Linux, you can install all kinds of apps on there, like lots of other games, Wikipedia, and even a basic Unix shell. Nice overview article here, but check out iPodLinux.org for all of the juicy details on how to void your iPod warranty. Sorry, I phrased that badly… I meant to say: improve your iPod. 😉