7 years ago I ported QT 2.3 to BeOS (
http://www.bebits.com/
app/2420). There were a number of reasons why I didn't continue the port:
- it needed X11. A better approach would be to create a BeOS native Xlib wrapper, so that X11 applications can run rootless. This is what Mac OSX uses to run WINE, NeoOffice etc.
- Qt apps are not BeOS apps. It may bring quick and dirty KDE applications across, but you miss out on all advanced BeOS native concepts.
After that, I figured that my time would have been better spend developing BeOS native applications instead of being a QT maintainer for BeOS.
As far as bounties are concerned, it is almost trivial to port Qt using X11 with a posix OS.