Hi, thanks for the plugin (wonderful idea!) but it seems to be not compatible with plugin Reveal IDs for WP Admin http://wordpress.org/extend/plugins/reveal-ids-for-wp-admin-25/.
The second thing - could please you make the $settings variable public or provide a way to get the attachment-id linked to a specified taxonomy-term-id? (The do_action way relies it's in $wp_query which is not too flexible I think...) Thanks. Edit: I know I can get it via get_option('taxonomy_image_plugin') but that's not too nice, is it... :-)