Delkin's USB Bridge sits between two USB devices and transfers data from one to the other. This means that you can transfer images from a digital camera's internal memory or memory card to a higher-capacity medium such as a USB thumb drive, PDA or other portable hard disk.
It's more expensive than we would have liked, especially since it uses the 12Mbit/s USB1.1 standard as opposed to 480Mbit/s USB Hi-Speed, but with no similar devices on the market and bearing in mind the high cost of camera media, it's a useful gadget.