Ok, the good news is I have taken source and managed to get it to build for S60 3rd Edition and have it working on my N73!
The bad news is that due to 3rd edition platform security you will needed a Symbian Signed Developed Certificate to use it as it needs WriteDeviceData capability. If you know what I am talking about and how to sign sis files, I can send you the unsigned sis.
Does anyone know how I can get in touch with the gnubox maintainer?