LibBluedevil is a Qt based library which makes easier to develop Qt based applications that use BlueZ abstracting the developer from DBus.
How to collaborate
LibBluedeivl is a KDE project, so we use the usual ways to communicate to each other, and to work together.
Currently LibBlueDevil is under playground/libs, move it to kdesupport can be expected in the future.
We're using the kde-hardware-devel mailist kde-hardware-devel