Zaurus support from the Affix project kind of stopped a while ago. I think they had a developer or two leave but I may be wrong.
The BlueZ drivers support every profile and as cwaig said, the KDE Bluetooth framework uses OBEX and the BlueZ drivers (I've used it on my PC too). AFAIK, Affix still only has a test app for OBEX stuff. Also, the way in which RFCOMM works with BlueZ makes it much easier to work with other applications, like the Network applets.
It's just a case of finding time to look through the existing code and porting it to the Zaurus.