French community of Yii are rebuilding their website under Yii and the source code will be available for download.
We are not expert of Yii framework but we still are learning more and trying to be as good as we can.
At the moment we can have a quick view of the user administration on the backend: http://dev.yiiframework.fr/admin.php
Source is available here: http://www.assembla.com/code/yiiframework_fr/subversion/nodes
Design is really impressive.