From email we got:
You might remember me as the guy who created MacRPM (MacOS utility to extract files from RPM pacakges) a couple of years back. Well, now I've gone and done it again, except this time it's for MacOS X. The new app is called RPMinator. I've just released version 1.0, which has rather basic features.
It's a SourceForge project (http://rpminator.sourceforge.net) and I'm looking for help if anybody is interested. The RPM UNIX application has already been ported to MacOS X. What I'm hoping to do now is create a first-class RPM GUI tool in Carbon.