If you re looking to charge something, i think you are thinking of the MintiBoost
. The MintiBoost should be able to charge anything that can charge from USB, such as USB compatible cell phones, PDAs, and the like. Your Palm should charge fine. Be aware, there have been reports of BlackBerrys drawing massive amounts of power, and compatibility issues with Apple iPhones (although, i think a fix is in the works).
The MintiMP3 is an MP3 player, the MintiBoost is a battery powered USB charging device.
Edit... i just looke,d your T3 is on the Known to work list