AFAIK Fingerscrolling won't work with the 4.5.3 Qt that was distributed with release units (later git versions have it), and QMaemo5KineticScroller is Qt 4.6... I'm just saying this because if you want to push to Extras-testing and Extras, that might cause an oops or two.

See http://wiki.maemo.org/Qt4_Hildon#FREMANTLE_.28Qt_4.5.29 for some details.