I'm building a mythclient for use at home.  It's being installed on FC5 using the ATRPMS repository so I can do a simply yum install mythtv-suite.  Except that there is a missing dependency that, as it turns out, is hard as hell to resolve.  MythMusic depends on libmp4ff which (after much googling) I discovered was at one point part of the faad2 package.  But for some reason it's no longer in that package as it exists on any of the major package repositories.  I tried downloading the source for faad2 but found it isn't a quicky build (the build environment is rather picky and didn't work on my FC3 machine).  

After much searching, I found a discussion that pointed to a link that had FC4 RPMs for faad2 over on RPMFind that does include the mp4ff library.  The RPMs are for previous FC releases – I grabbed the one for FC4.  Why this is not in the current library I don't know.  The FC4 RPM for faad2 installs fine on FC5 but I don't have any idea if it will actually run.  I haven't tested it yet and, at least at the moment, I don't have any interest in using MythMusic.  But at least this rpm resolved the dependency issue.  So now I can install MythTV-Suite from ATRPMS.

BTW, MythTV-Suite takes up about 114MB of disk space and has 107 packages.  So you can see why using it is preferrable to building the source from scratch.