Excellent presentation, tackling miss-conceptions can only be a good thing.
I have a strange issue with the gtk-bounce program from the video - on (k)ubuntu 12.10, spectrum and waveform work just fine, but if I scroll into the gtk-bounce panel, the cursor disappears. Anyone seen that behaviour?
It disappears on purpose-- it was intended to be a touch app in the demo. If you want to keep the mouse cursor, comment out the calls to 'hide_mouse()' in gtk-bounce-widget.c