spaceballs...

[DJ Delorie]

Is there a standard for how multi-axis trackballs (spaceballs)
interact with X?  Are they common enough to "just work" now or is it
the usual proprietary-hardware-nightmare still?

The common trackball seems to have the ball, some scrollwheel
replacement and a bunch of buttons.  It would be nice to be able to
*rotate* the ball, or push it in various directions, etc.  But only if
there's a sane mapping to X events.