I have added a provisionary fonts plugin to fedora-review. It's available in the devel version, see [1].
f-r is now early in the 0.5.1 cycle. To be successful, this plugin needs to be tested by people understanding fonts. I'm certainly no such a person, so I would very much appreciate any kind of feedback on this plugin. In this list, in the upstream trac instance[2] or bugzilla; anything is fine. The upstream bugtracker is preferred, though.