Gmail – login to the Google Apps mail using the OpenID from theopenid.com

It seems like this was enabled last year. Here is the blog-post:

http://googlecode.blogspot.com/2009/07/google-apps-openid-identity-hub-for.html

Note: The Federated Login Service is disabled by default for Google Apps Premier and Education Editions. The domain admin can enable it from the Control Panel at http://www.google.com/a/cpanel/<your-domain>/SetupIdp.

The OpenID URL for Google Apps is something like:

https://www.google.com/a/<your-domain>/o8/ud?be=o8

Unfortunately Disqus doesn't allow for the use of OpenID avatars as the profile image.

Also, it looks like the services that Disqus is using to import avatar images aren't OpenID providers. Source: http://openid.net/get-an-openid/

I tried to find some options around (like ifttt.com) to see if there was a way to automatically update your gravatar/Facebook/Twitter image when you update your open id image. I couldn't find any.