Hello,
I forgot to mention that the page for rating packages is already available at:
http://www.phpclasses.org/rate.html
Obviously, contributors may not rate their own packages. Only users that have downloaded a package may rate it.
Although I have not announced this to the majority of the users, you may already tell the users of your packages to rate it and that will also count for the user rating ranking and upcoming PHP classes programming contests.
Regards,
Manuel Lemos