Hi all. I have a suggestion for the software more then the book port itself. When transfering several files, particularly mp3 files, it can take quite a bit of time, which takes battery power in the book port. A good feature for the software might be to support other flash card readers. This way, you could connect a flash card reader, and the software would transfer the files in the appropriate format to the compactflash card, then you simply pop the card in to the book port when the transfer is done, might save a bit on the batteries.