Thread:Project:Support desk/Code for mediawiki.org's login and create account pages

I just noticed the login and create account pages at mediawiki.org (http://www.mediawiki.org/w/index.php?title=Special:UserLogin&returnto=MediaWiki and http://www.mediawiki.org/w/index.php?title=Special:UserLogin&returnto=MediaWiki&type=signup). These seem to be much cleaner than the default forms distributed with 1.21.1. Is the code/templates driving these forms freely available?