Picked up from Internet Tablet Talk, there're a couple of videos showing how bad the OpenMoko UI is on basic usability challenges.
What's interesting is that the small comparison with the iPhone shows how poor hardware (pressure-based touchscreen, bezel around the screen) combines with poor software implementation (separate apps => slow start-up times, little thought to the size of a usable target area) to emphasise the poor user experience. And, frustratingly, how many of the issues raised cut quite close to the bone for Maemo devices too :-(
Hopefully the UI changes in Fremantle (for example, #2564) will be a big help; and a concentration on finger usage may allow a more sensitive, different, touchscreen technology to be used in the N900. Will be very interesting to see the UI talks at the summit - see you there!