Wikimania 2005 website
The Wikimania 2005 website was an independent MediaWiki install on a machine in a Wikimedia cluster, modified so that only logged-in users can edit or see the tabs atop each page. A whitelisted set of pages was publicly visible; the rest was only viewable by logged-in users.
To see what the layout of the site was like, start with Wikimania 2005:Main Page. (You may also be able to find full page histories on the original site, at http://wikimania.wikimedia.org .) "Wikimania.org" and related sites were already owned by someone; who kindly redirected them to the conference site during the conference.
A few publlic pages on the site were db-generated pages separate from the wiki. For instance, registration forms and attendee-listings were generated in this fashion.