Oke, this is what you need to know right now: You don’t need to have/use Yahoo! ID to join Flickr. That’s right. Today, Flickr allows new signup using Google Account.
With dozens of different login usernames and passwords out there on the Interwebs, who needs to add yet another one to the list? To help solve this, Flickr is rolling out a new feature to make it easier than ever for new users to join our community. We’re introducing OpenID on Flickr, a service that makes it faster and easier to sign-up for new accounts by letting you use one identity across multiple websites. So starting today, you’ll be able to use a Google account to sign-up for a new Flickr account. [source]
I just tried it, and it works. Also, Flickr simplifies the login process. Previously, if you’re on a single photo page, and you want to give comment, clicking the “Sign-in” link will bring to to another page. Now, you can sign-in without leaving the page. Yahoo! works really hard these days. :D
Anyway, I’m on Flickr too of course. :D