I know that it will be a *lot* of work, but I think that a better GUI will also increase the number of users. Some friends of mine dont use RS, because they had great difficulties with using the GUI. Of course, once you learned how to use it, you will find a way to use it, but a better gui also gives people who have no time or skills to learn it the chance to use it.
As I already mentioned, I dont know how to use qt, but I read that qt supports CSS 2.1. If someone with qt-skills can help me with the GUI, I could at least contribute the graphics and the CSS-Code. Most of the GUI-forms I saw in the source-code can be used for this, its just a kind of 'rearrangement' and improvement of the old GUI.
If anyone who knows how to use qt has interest in developping an improved GUI, just write me