Recently, Daniel and Adrien have been rocking with KPackageKit and QPackageKit.
The library is coming on nicely, and the tools are starting to look very KDE like. They could do with a hand, so if you want to get involved, jump on the mailing list and introduce yourself to those two dudes.
See here for a sneak preview. There’s also a screenshot of the OpenSuse updater, which is also working with a PackageKit backend now.
Next step, world domination. Seriously, rock on.