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Answer 1

+2 A:

There is a partial list of OpenID providers on Wikipedia; Facebook is not an OpenID provider, preferring to make you use Facebook Connect. Myspace uses "myspace.com/username" as the federated identity, while wordpress uses "username.wordpress.com".

Wooble 2010-08-28 13:54:58

Answer 2

+3 A:

Google documentation mentions following direct providers of federated identities ...

google.com/accounts/o8/id (shorter alternative: gmail.com)
yahoo.com
myspace.com
aol.com
myopenid.com

... as well as username provider federated identities:

flickr.com/USERNAME
USERNAME.wordpress.com
USERNAME.blogspot.com
USERNAME.livejournal.com
openid.aol.com/USERNAME
USERNAME.myopenid.com
www.myspace.com/USERNAME

Facebook is not an OpenID provider, forcing its own standard Facebook Connect.

Michal Sznajder 2010-08-28 14:18:01

Facebook started to accept OpenId a while ago: http://developers.facebook.com/blog/post/246The linked article show how to achieve a user-friendly login with multiple providers. You basically create links to the services you want to support using `users.create_login_url(federated_identity=...)`.

moraes 2010-08-28 16:24:36

I think you can log into Facebook with OpenID but you cannot use Facebook account to log into for example stackoverflow.com.

Michal Sznajder 2010-08-28 17:08:04

Very thanks for the response dose google accepts microsoft live ids and in.com ids via open id i found some publishers using these two for open id, may be not on google frame work.

sandeep koduri 2010-08-30 06:52:50

There should no problem since OpenID is an open standard.

Michal Sznajder 2010-08-31 06:47:51

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Federated identity on Google App Engine

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