Yesterday there was a request on qt-interest about the current state of qdbus/windows. This is now the second request on this topic from a company evaluating the use of dbus on windows :)
The other one already contributed to the windbus code base. They want to use it on windows CE - looks like we can soon compile Qtopia with dbus there. Let's have a look until someone is interested in running kde apps on winCE.
Some people may ask why we still don't have a working windbus implementation in the mainline dbus cvs. I think the main problem here is that our gnome friends don't have a real interest on porting their apps to windows and therefore don't care much. Hope they'll change their mind with the increasing (commercial) interest using dbus on windows...