Yes, AllMovie is taken over by Rovi. I renamed the AllMovie plugin to AllRovi and fixed some minor stuff.
It will be included in the next release of griffith. In the meantime it is necessary to download the plugin
manually from
http://svn.berlios.de/svnroot/repos/griffith/trunk/lib/plugins/movie/PluginMovieAllRovi.pyThe file has to be placed in the directory plugins/movie of the current installation.