Gefen has developed the Ex-Tend-It USB-400, a product which extends the length of USB cabling.
USB is limited to a reach of 17 feet. Gefen's solution extends this reach to 330-feet. It does so by combining a powered USB-hub and an extension into one device. It includes a remote four-port USB hub, each of which can handle 12.5MB of data and is able to extend USB peripherals a distance of 330-feet with just a single cable, no additional hubs and "little chance of system crashing", Gefen claims.
Extending a USB cable in this way traditionally requires a series of powered USB hubs daisy-chained by short lengths of cable - a laborious and expensive solution. Ex-Tend-It USB-400 costs $499 online.