Flickr now allows its visitors to quickly login or create an account on the popular Yahoo!-owned photo sharing site using their Facebook account. Yahoo! became an OpenID relying partner earlier this week, and now appears to be rolling out the reduced friction new user on-boarding process to its sites. Since Flickr users can instantly share their links for their public photo uploads to Facebook, Flickr may see more referral traffic. However, Flickr may also experience decreased direct visits since users won’t have to check the site to see if friends have added new photos.