Karmic Alpha 5 fixes most (if not all) the pulseaudio issues. I have it playing audio out of my spdif setup without having had to configure anything outside of selecting the appropriate device via the GUI interface.
PS -- gpsd, however, is somewhat broke in Karmic
PS(2) -- usbtouchscreen driver works in Karmic (although it took multiple calibration attempts
to get it right). Advantage is no need to compile in new drivers. Ubuntu maintainers
seem interested in having touchscreens work with Karmic across the board.