Great to hear that you are interested in our diagnostic software. The issue with Nokia N900 is the missing official support for Qt Quick Components 1.1 on which the UI relies totally. All the logic is done with C++ but the whole user interface is implemented with QML. That means that we would need to re-implement the whole UI again.
Nokia Developer former Forum Nokia will provide a community port of components to Ubuntu Natty, Maemo5, and MeeGo 1.2.