PS. Be sure to check http://wiki.maemo.org/Qt for generic Qt on Maemo stuff, most of it is directly applicable to pyqt, too (except for scratchbox, which you don't need ).
Porting a Qt desktop application to Maemo requires very little effort. This because the Maemo Qt libraries will take care of giving the Hildon look & Feel and enabling the virtual input methods for your application.
Maemo Qt is based on Qt for X11. It shares the same API avoiding API breaks. In this way every Qt application that runs in other platforms (Windows, Mac OS X, Linux, S60, etc.) can run also into the Maemo devices.