Tonights night work got cancelled so I had a bit of time to play around. I've heard a lot about knetworkmanager and I would try it out now that I've upgraded my hardened laptop to gcc-4.1 as it refused to compile with gcc-3.4.6. However it still refuses to compile complaining something about NMActStage and knetworkmanager-device.h:76: error: expected ',' or '...' before '&' token. It turns out that it's not a GCC problem but simple the version of knetworkmanager in Portage being incompatible with the version in rbu's overlay. So after masking the newest version it at least compiles. However connecting to a wireless AP results in:
*** stack smashing detected ***: knetworkmanager - terminated
knetworkmanager: stack smashing attack in function <unknown> - terminated