The prefinal image is the newest available, I have no idea why Nokia haven't released the final image. The prefinal image does not have the newest Qt Creator programs. I gave up using the image entirely. It is too troublesome to set up and to use. I am using Qt Creator on Windows with MADDE in order to build for N900.

Setting up the development enviroment for creating applications for N900 is not easy, it is the toughest enviroment I have experienced so far. I have developed for normal J2ME, BlackBerry and iPhone.