The drive, called the KanguruMicro 2.0 costs just under $1700 - you could buy an Apple PowerBook 12-inch for that price, or six Apple iPod Minis, which hold 4GB of space. The iPod drives use Hitachi's mini hard drive, but the KanguruMicro 2.0 uses NAND flash memory.
Read about the KanguruMicro 2.0 and other USB devices here. ยต