How good are you with KDE btw?
There are two practical issues which I would appreciate help with:
1. For Katana (available for Linux from their upstream and for MacOS via my PPCPorts):
Text input in Konsole does not work, nothing reacts to keyboard at all. Menus work, GUI otherwise is normal. Text input in Kate etc works normally. So something is broken specifically for terminal or just Konsole.
2. For standard KDE4: cursed nepomuk does not run correctly and a lot of apps crash on launch. Maybe I just fail to set up dbus or smth else correctly. But Kate and many useful apps are broken in result. (Some do work though.)
MacPorts do not have a usable KDE4 installation, and I don’t have a complete one in PPCPorts, but I can make one in a day: it will install, but it is half-broken. If you know how to debug that, it would be great.