Whew! It's been a crazy few days to prepare a quick demo. sreeves and I have been hacking away at a proof-of-concept zypp backend for PackageKit. Today we finally installed our first package with it. We've only implemented four of the twenty or so methods you're supposed to implement, so it still has a ways to go before it'd be considered truly usable.
I'm excited to see PackageKit moving along. As someone who really likes smart, clean, and simple UI, I think PackageKit will fill a serious void in end-user package management. I also have to admit that I love projects where the main developers respond quickly to apparent newbies and make them feel welcome. Kudos to hughsie and others in #PackageKit on freenode!