You can click on the Google or Yahoo buttons to sign-in with these identity providers,
or you just type your identity uri and click on the little login button.
read http://sw.deri.org/2007/07/sitemapextension/ and implement it.
see also http://sindice.com/developers/publishing
Ticket #979932 - latest update on 2010/10/20, created on 2010/05/25 by Nicolas Chauvat