Well, zypper sound interesting but all I've seen in the bugzilla tells me that it isn't in the Fedora's plans. It isn't even packaged as of yet.
From one of the recent package reviews
"libzypp currently doesn't find noarch and multiarch packages on Fedora, and upstream is being totally unresponsive on the issue, so I'm closing this for now."
Besides that, there some other reviews open since 2008... So it seems that there is no real momentum to get this done.