Get your guild's progress in a widgetized form with the WoW API. See a DEMO at http://www.guildcrisis.com on the sidebar. That site uses vBulletin, so this can be embedded on a PHP-based site if you host it.
You must set up a database and configure your guild settings and WoW API key. See http://dev.battle.net to get a key. Once done you can use an iframe like so to embed your progress:
<iframe src="http://url-to/show-progress.php" style="border:0px #FFFFFF none;" name="Guild Progress" scrolling="no" frameborder="0" marginheight="0px" marginwidth="0px" height="400" width="100%"></iframe>