Once more, LJ valid_to timespan.

[Martin Atkins]

Brad Fitzpatrick wrote:
>>
>>It seems to me that the purpose of a (may be misnomed) Single Sign On is
>>not to escape the login/logout dialogs
>>but to avoid password proliferation or dissemination and to share an
>>identity or somesuch weaker ID.
> 
> 
> I'm with your school of thought.
> 

Me three.

I don't think anyone (until recently) really called OpenID "Single 
Sign-on" anyway. It's always just been an identity assersion mechanism.