Take the tour ×  Is there an OpenID provider that is really
exemplary for use on an iPhone or other mobile devices?  Before
you say this belongs on meta.stackoverflow.com, hold on, I
promise this is a programming question.  If designing a highly
mobile site, it would be nice to offer a large button linking to
them from a login page (like the Google link gets a large button
on Stack Overflow) so that it would be easy to hit them with a
fat finger and log in quickly.  What would make a good mobile
device OpenID provider?    • When you are redirected, the
provider has a specific mobile-savvy login interface. You
shouldn't have to pinch-zoom your iPhone just so you can select
the username or password box.   • The provider should offer to
remember you for a good long while so you don't have to keep
typing in a complex password each time you visit.   • Login (and
possibly even sign-up) should be as few screens as possible.
There should only ever be one page displayed from the provider
before redirecting back to the