I just noticed that Yahoo has tweaked their advanced search page. You'll now see an new option that allows you to limit your query to material with a Creative Commons license. A Creative Commons "only" search interface is also available. Yahoo and Creative Commons announced a partnership in March. More in this post.
This Year's Premier Digital Marketing Event is #CZLSF
ClickZ Live San Francisco (Aug 11-14) will bring together the industry's leading online marketing practitioners to deliver 4 days of educational sessions and training workshops. From Data-Driven Marketing to Social, Mobile, Display, Search and Email, the comprehensive agenda will help you maximize your marketing efforts and ROI. Register today!