Discovery of an OpenID session at an OP

[SitG Admin]

>Now the difficult part. We need the browser to maintain a list of 
>the user's OP's with their endpoints, and the browser can ask the 
>user which OP he would like to use.

With due privacy settings; most browsers prompt me before "saving" my 
password, GOOD browsers let me disable the prompt entirely since I 
know the answer will always be "no" ;)

>This can also be done if all OP's were to advertise to the browser, 
>their endpoints whenever a user creates a new account with the OP, 
>or when the user visits his home page at the OP. eg.

If my OP is only identifying *me*, does it still need to advertise a 
generic "all users" endpoint, or will this point be moot since all 
single-user OP libraries will act no differently than multi-user OP's?

-Shade