Hi,
I just finished the implementation of OpenID authentication support
(
http://jira.xwiki.org/jira/browse/XWIKI-2588). You can download a ZIP file
containing all the needed patches from here:
http://jira.xwiki.org/jira/secure/attachment/13049/openid-authentication-pa…
Make sure that you update the user profile page so that the "Attach OpenID"
button appears (it's included in the applications patch).
Please test it out and report me any errors you find. You shouldn't find
many since it's already well tested :-)
Cheers,
Markus