http://dreamhelg.ru/2010/05/intorducing-into-custom-taxonomy-wordpress-3-0/

http://wpcafe.org/tutorials/custom-post-types-polzovatelskie-taksonomii-filtryi-i-arhivyi-v-wordpress/

http://wpcafe.org/tutorials/dobavlyaem-rubriku-svoyu-taksonomiyu-i-metki-dlya-mediafaylov-wordpress/

http://ruseller.com/lessons.php?rub=40&id=1401