Is there a list of supported hardware anywhere? I’m looking for something with support for Logitech’s MX Air (including support for all the motion-sensing abilities) and also something simpler like the Force 3D Pro. Am I on the right track? 
Edit: Fixed topic
There is no such list I’m afraid. It’s just a case of try it and see, especially with the more exotic hardware.
Endolf
Thanks Endolf.
Are there at least methods in the API which would in theory pull motion tracking data from a device?
The API just knows about axis and their values, so if thats how the device driver exposes the information, then yes, we should be able to.
I theory, JInput supports any device under windows that has a directx driver, and device under linux that gets exposed via the /dev/input/event* device nodes, and IIRC, and HID device under OSX. Obviously we are heavily relient on device drivers to do the right thing and it would be impossible for us to test every device, even if the manufacturers sent us engineering samples. Which they don’t.
HTH
Endolf