go get a multi card reader. I have a SONY one, it was only ten bucks. My friend has one by Targus or something like that. OR you could find a product around the house (digital camera, cell phone, so on) and see if it has a USB port. So put the SD card in the device and hook it up to your computer.
you should be more specific, do you have a palm? windows mobile? before thee are programs to allow you to do that