Pin Name Description
1 VCC +5 VDC
2 D- Data -
3 D+ Data +
4 GND Ground
It really would be easier to just buiy one, but there's the pinout for a USB port. However, to extent them, take an existing set of USB headers, chop 'em in half, and extend with Cat5 cable. 4 pins per USB port... 8 wires in a Cat5 cable... It works out nicely, methinks.
Knock your socks off.