I had a very short look at the Windows Identity Foundation (WIF), and it seems to me that I can say that my site will accept logins from other sites. for example, anyone with a gmail or LiveID account will be able to post comments in the stream in my application. When you click the "Send comment" button, the user is redirected to the provider, and they register there, after which they are authorized on my site for publication.
How can I find out who offers the STS engine and which URL will be served in WIF?
I found LiveID through a bit of googling, but if I wanted to find a Facebook or Yahoo service, etc., how can I do this? Searching for STS providers and its various spells is not too much.
Many thanks
The beta version was released quite recently, which includes several STS providers for things like google and facebook for those who consider this later
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