Paul Madsen has a knack for pithy identity wisdom. But his recent piece on HealthVault’s use of OpenID made me do a double take. “Simon Willison defends HealthVault’s choice of OPs [OpenID providers - Kim]. “I disagree. It is I, as a user, that should be able to dictate to HealthVault the OPs from which they are to accept identity assertions through OpenID. “Just as I, as a user of Vista, should be able to dictate to Microsoft which software partners they work with to bundle into the OS (I