Have you considerer smart : http://www.smartpm.org/
It is Interesting. But sometimes it ignore %{epoch} (for good or bad reason it's not the point), does not support group, the gui interface is a little confusing. Smart is quite fast (python), have gnome, kde, text interface. It's in beta/testing stage.
At this point smart doesn't have multilib support (at least from reading of the code) so I'm not sure how useful that will be for a distro offering (soon, I hope) two multilib archs: x86_64 and ppc64.
It belongs in at least in Extras with ExclusiveArch: i386, ppc. If upstream adds multilib capability later, then the arch support can be expanded.
Warren
