This is a very cute xmms plugin which gives it similar functionality to iTunes on MacOS X. It automatically tries to determine which songs you like and play the ones you seem to prefer more often. Check http://www.luminal.org/phpwiki/index.php/IMMS for more info.
Created attachment 16093 [details] media-plugins/xmms-imms-0.9.ebuild
xmms-imms-0.9 has been added to portage with some minor changes from your submitted ebuild. Please test and let me know if you find any problems.