If you're a cheapskate and don't need all these other options, PowerPoint lets you "Save As" either a .TIFF or JPEG, which you can use to create a slideshow and run from your iPod. It's time consuming, but the price is right.

To connect your iPod to a projector, buy a $59.95 product called the Monster iTV Link for iPod and use the high-quality S-video option. You'll also need to buy the $39.00 Apple iPod Universal Dock if you don't already have one. You can leave the iPod in its cradle, and advance slides using the included remote. (Bonus: You can also use this gear at home to connect your iPod to your stereo, TV and computer.)

From a RIM BlackBerry

There's only one way to present with PowerPoint from a Blackberry, but it's a good one.

A company called Impatica offers a range of products that enable you to convert, share and present PowerPoint presentations with a BlackBerry. A $249.99 hardware/software product called Impatica ShowMate, connects your BlackBerry to just about any projector, either directly or via Bluetooth. ShowMate comes with the company's free Impatica for PowerPoint, BlackBerry Edition, which converts PowerPoint files into a BlackBerry-compatible format and displays them on the device. You see your PowerPoint speaker notes on the BlackBerry, but your slides on the screen! Best of all, ShowMate preserves animations and transitions.