If you're thinking of selling some of your old gadgets, check out this article from today's edition Chicago Tribune.
* for broken iPods, check out buy-back sites iPodResQ.com (in the left-hand column, click on "We Buy iPods!"), TheDropSpot.com/ipod, PodSwap.com and iPodMods.com. I know that there are similar buy-back sites for old Palm devices.
* for computers, make sure that you completely erase the hard drive, rather than just deleting old files. Search the Web for "data scrubber" or "data eraser" to find software that will overwrite every writeable part of your hard drive with zeroes and ones.
* for T-Mobile and Cingular cell phones, make sure that you remove the SIM card, located behind the battery. Your buyer will take his SIM card out of his old phone and pop it into the one you've sold him. (Sprint and Verizon store your phone information in their databases, so they don't have SIM cards.)