The Creative Commons has released CC Search Beta.
From the announcement:
The prototype of this tool focuses on photos as its first media and uses open APIs in order to index the available works. The search filters allow users to search by license type, title, creator, tags, collection, and type of institution. CC Search Beta also provides social features, allowing users to create and share lists as well as add tags and favorites to the objects in the commons, and save their searches. Finally, it incorporates one-click attribution, giving users pre-formatted copy for easy attribution.
Read full announcement here.