My father is a computer moron, but he seems to understand the Central I got him for christmas a couple years ago. He's jogging on a regular basis now and wants to take MP3s with him. Obviously using the Central to send tunes to a portable is the easiest method for him. What is the largest (in terms of memory) flash player the Central will send tunes to? I don't mind getting an SD card if needed and the Central would recognize the added memory.