If you were marooned on a desert island and you could take one thing with you, what would it be?
Ok, that's not what you meant. Does this island have wi-fi or 3G coverage? If so I'd take an iPad and a solar charger. I'd have a communicator, a musical instrument, a camera, a writing pad, radio and movies, a compass, a map, unlimited scat-porn and, when I got bored with all that, a frisbee.
Without Internet it'd be just another pointless lump of plastic so instead I'd take a really good knife.