OpenID is currently provided by xblade11-2 as VirtualHost openid.osgeo.org.
There is a backup on osgeo2, in /home/other_backups/openid/, with a README in it:
* Load 'mysqldump' into a mysql database. * Edit config.php to point to the right database and username/password for read/write access. * Configure apache to allow rewriterules for the 'openid' directory * Point a VirtualHost with name openid.osgeo.org at the openid directory as a document root.