Audrey, you can find more details at
http://freehandsystems.com/ . The gadget is simply a display device that can contain your entire music library in a relatively small package compared to managing all those books. The memory capacity is only limited by the size of USB Jump Drive that you have. (It also works with the SD card reader that I have been using with my KN7000 files)
Mark, I don't expect to see any significant reduction of the price of the MPP in the near future. It is, after all, a computer with a somewhat limited sales market.