GlovePIE is an application that maps input from (unusual) devices onto whatever else you want it to be mapped to. You can use Wiimotes to map to mice commands, joysticks to map to typing things, whatever. If it causes input, GlovePIE can intercept it and fake output as something else.
Combine this with a program called
PPJoy, which allows you to create "ghost" or "software" joysticks that Windows think are real, and you can map whatever you want to a "plain old analog" joystick.
So, intrepid reader, you can now read a Wiimote into a computer and trick the computer into thinking it is whatever you want. Couple this with a bit of software, maybe a custom circuit or maybe just your serial port, and an FRC Controller, and what could you cook up?
A hundred thirty pound robot driven by a Wiimote.
This is on my to-do list for winter break.
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PS, that whole wiimote thing is a tangent. Use GlovePIE and you can map the input joystick however you want.