I just thought I'd give a small update. I've chosen porting Gonvert to QT as my way of learning QT.

I've so far got the category selection, unit selection and conversion, search, and sorting done. I still need to save the users last selected unit, some keyboard shortcuts, and always keeping the unit entry focused. I also am looking at implementing recent and favorites support. I've still not "hildonized it" (whatever that means for QT) and it crashes on close.

I plan to still have the GTK version available for Maemo 4.1 and at some point I will probably switch Maemo 5 over to QT.

If you have any suggestions for the process of switching over the UI, let me know.