I would actually like to recommend livna only in my HOWTO, but there are things it lacks. If livna wants to be the one-stop shop for everything proprietary and patented that isn't in Fedora Core (which is where it seems to be heading, and I heartily approve), then it needs to carry the following:
Java jre RPMs (see Dag Wieers's repostory) mame and mame ROM RPMs RealPlayer RPMs (see http://cambuca.ldhs.cetuc.puc-rio.br/xine/) Win32 binary-codec RPMs to be used with mplayer