[support] OpenID Server, Intimidated

I'd like to set up an OpenID server, preferably in Drupal. I found the following modules, read the descriptions, and I don't get it. http://drupal.org/project/openid_ax http://drupal.org/project/openid_provider http://drupal.org/project/openid_sreg Could someone provide a high level overview or suggestion for setting up an OpenID server so that my users can log into other sites with the OpenIDs from my site? -- Sincerely, John Thomas