Comment 18 for bug 210943

Let me add another reason why this is important. There are large communities out there (expecially in the higher-educaiton and research space) that build federations using SAML 2.0. Although the trust and privacy expectations of SAML 2.0 and OpenID 2.0 are quite different it is relatively easy for those communities to provide SAML->OpenID provider gateways. It may well be that launchpad will become more attractive to those communities opensource efforts if the login/user provisioning process is taken out of the picture.

Let me also take the oportunity to plug http://rnd.feide.no/simplesamlphp as a candidate for your RP implementation. By using simpleSamlphp you'd get most current id technology: SAML, OpenID, InfoCard plus some lesser known ones. Its all php, opensource and dead easy to use.