Hi,
In later March there was a thread about openID support for xwiki, at the
time I mentioned new project we were about to launch which could solve
the openID issue as well as shibboleth, active directory and LDAP
integration.
That software is now available at
http://esoeproject.org
Have a look at what it can offer I would be happy to work with the xwiki
community further to integrate appropriately.
regards,
Bradley