Team 230 has a board for the roboRIO MXP expansion port which provides access to the various additional ports using standard PWM connectors.
We shared 31 of these boards last year (free of charge) with 22 different teams from 4 different countries... and we would be happy to share it with you as well. If you pm me with an address we would be happy to ship 1 or 2 out to you.
Let me know if you have any questions... or see more info here:
http://www.chiefdelphi.com/forums/sh...d.php?t=131842