Well, it sort of works now, if I click cancel after picking the mapping. =S I played couple of hours without any major problems, but program seems to crash in every other setting I touch (resolution/skins, skin options, sound card options. Then again, all those may be connected to mapping, because somehow mixxx doesn't want ok after changing the mapping). I'm using Lenovo Thinkpad Edge 13", SU7300, 2Gb memory and Xubuntu
Most of the buttons seem to be in place. Proximity sensor doesn't seem to do anything. Loops-Effects-Sample -button could do more, if it would be mapped differently. I would also change -/+ buttons to adjust gain, because the controller lacks couple of important knobs. Jog wheels are too sensitive for my taste. I find it hard to correct the tiniest offbeats. Also the fast skipping, (song on pause, pressure on jog wheel and turn) goes from start to the end of the song in just a very small movement.
And after all, it would be nice, if also the led lights on buttons would work.