At the moment, I'm using a wireless trackball to control my LinuxMCE machine. The problem is, it only has buttons 1-3 - I assume other functions are mapped to buttons 4 and 5 (mouse-wheel), as I'm unable to seek at all and I can't unhide the UI without using the keyboard. My middle button does nothing currently, it'd be nice if I could map right-click to always return to the initial screen and the middle button to cycle/toggle seeking modes so I don't have to touch the keyboard.
Is this possible? If not, is it even possible to seek without a mouse? I may well get the gyro mouse used in the demonstration video, but I'd like to know if I could achieve reasonable controls using what I already have...