If the libraries are ported (or at least Qt) then it should be very easy to port the applications. What kind of work is required in order to make Qt accelerated? Is it slow because of the missing 3D? Is there something different in the X environment of MeeGo and that of Diablo that makes these libraries accelerated on MeeGo and slow on Diablo? Isn't it on both places the same good old X?
After Mer I have some doubts that anything usable will come from 'MeeGo_on_N8x0'.