Some time ago I needed D-Bus bindings for one of my wxWidgets projects. Since I couldn't find bindings available, I've written my own. May be you will find them useful too. The bindings themselves may be downloaded here.
Update: download improved version by Tim Kosse.
The model used in these bindings is pretty straightforward, so if you understand how D-Bus works in general, you should have no difficulties working with these bindings.You can also dowload a demo showing how to use the bindings to make a wxWidgets application to communicate to the Skype client program.
Contacts: anb@symmetrica.net