also last.fm: http://www.last.fm/api http://www.last.fm/api and musicbrainz: http://musicbrainz.org/doc/Development/XML_Web_Service/Version_2/Search http://musi

also last.fm: http://www.last.fm/api http://www.last.fm/api and musicbrainz: http://musicbrainz.org/doc/Development/XML_Web_Service/Version_2/Search http://musicbrainz.org/doc/Development/XML_Web_Service/Versi...