Last year in FIRST Choice, Texas Instruments provided the Stellaris LaunchPad. There was also a companion booster pack and software load out available which would turn it into a USB HID gamepad:
http://processors.wiki.ti.com/index....cs_Competition
The system ends up giving you a total of 22 digital inputs, and 8 analog. Our team used this quite successfully in our operator interface for 2014.
There will be an update to this solution for the 2015 season to add additional features for teams to use. If you are already familiar with the Stellaris LaunchPad solution, the new one will be trivial to migrate to. More information will be available soon.