7th January 2008 Via ReadWriteWeb, view source on a Flickr photostream page and search for “openid” and you’ll be rewarded with the following snippet: <link rel="openid2.provider" href="https://open.login.yahooapis.com/openid/op/auth" /> Which means that Flickr pages will very soon be able to act as OpenIDs. The provider isn’t up and running just yet though; try authenticating with your Flickr Ope