When I tried to login to HN, I was offered to login using OpenID, via some site called ClickPass, and when I tried to login using my Google account's OpenID, there was a warning, all what ClickPass wanted was to access my contacts, rather than just granting a login access.
Here's the prompt:The site www.clickpass.com is requesting access to your Google Account for the product(s) listed below.
Google Contacts - http://www.google.com/m8/feeds
Any info?