There are six 'simple' providers listed. Spot checking: One of them has broken SSL (https://www.myopenid.com/signup sources https://api-secure.recaptcha.net which has an invalid certificate). One of them looks completely broken for new accounts: http://claimid.com/register "This account is hidden or does not exist."
And of course there's this: http://www.untrusted.ca/cache/openid.html which describes various security and privacy problems with OpenID.
There are six 'simple' providers listed. Spot checking: One of them has broken SSL (https://www.myopenid.com/signup sources https://api-secure.recaptcha.net which has an invalid certificate). One of them looks completely broken for new accounts: http://claimid.com/register "This account is hidden or does not exist."
And of course there's this: http://www.untrusted.ca/cache/openid.html which describes various security and privacy problems with OpenID.