Flickr announced of reaching the 200 Million (and counting!) public Creative Commons licensed photos mark on Flickr. "This makes us the largest CC photo repository in the world!," stated Flickr.
"You can browse and search those CC photos by license, or find exactly the one suitable for and available to you by using advanced search, ticking the CC checkbox, and searching for whatever image you are looking for."
"If you would like to take part in CC and provide your photography under a less restrictive license than "All Rights Reserved", familiarize yourself with Creative Commons, and apply a CC license to you photos, by either changing your default license upload setting or an individual photo's license under "Owner settings" on any of your photo pages," flickr added.