If you have a site you want checked out by the CSS masters, don't post it on the wiki. Send it to the list with information on what specifically you want checked, and the list members will review it.
Note: All messages on the list are publicly archived. If you don't want your client's URL getting archived on the list, don't post it. You can use a URL trimming service to obscure it if necessary.
Once your site check it complete, consider adding your page to the UserSites list.