I have “ported” my rotozoomer from the Nokia 770 to the FreeRunner/Neo
For a video output speed comparison I have made a video of it running on a Nokia 770, a Neo and a FreeRunner side by side.
The result is somewhat sad, but judge for your self.
Just remember that the 770 has 1.25 times the pixel count of the Neo and it is a lot older too.
Sources are obtainable from the Maemo Garage page.