How modular is GNUCash?

[Jason Boerner]

I just purchased a Zaurus (Linux based) PDA which uses Qt as it's base 
GUI library (as does KDE I believe).  I would love to use GnuCash on 
this device, but more importantly, I would like to be able to allow my 
family members to use GnuCash and they are stuck with MS windows for the 
foreseeable future.

It would seem that a port to KDE (Qt) would be one way of solving both 
these issues with one move. 

Q) Seeing Qt as one way to solve the portability issue, has anyone 
looked at using the Mozilla framework (XUL)?