Keynote2 allows you to export each slide as an image file. You can then add those images to an album in iPhoto5, and sync your iPod Photo. Now you can hook the iPod Photo to a TV, and give a presentation without a projector or computer.
You could make separate pics for each added element to a slide, and have a sort-of build sequence that approximates what you would get with a computer attached to a projector. iPod Photo even allows you to add music and basic transitions between slides. Finally, you can even manually control the changing of the slides as if the iPod were a remote.
Mac OS X Hints
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