Wel, AFAICT it's basically the N90's screen with a touch layer slapped on. In fact, it is pretty much the N90 "done right" or at least done right within the limitations of S60, although I have my reservations about their attempt to "Psionize" it. Psion were notoriously anal about quality control, something Nokia is not really famous for, so how long this intricate slider will keep working is anyone's guess.

What I personally find most "interesting" is that Nokia apparently has no problems churning out revision after revision of S60Touch, but fixing Diablo is beyond their means...