Flickr, the photo publishing, sharing & tagging network, has just announced that they will be cancelling their older email address based login system, and migrating over to Yahoo registered ID’s for users to sign in to Flickr.
We’re making this change now to simplify the sign in process in advance of several large projects launching this year, but some Flickr features and tools already require Yahoo! IDs for sign in — like the mobile site at m.flickr.com or the new Yahoo! Go program for mobiles, available at http://go.yahoo.com.
If you still sign in using the email-based Flickr system (here), you can make the switch at any time in the next few months, from today till the 15th.
Yahoo!, Flickr, Announcement