Yahoo has partnered with Creative Commons and released a new resource that restricts a web search (using the Yahoo web index)
to content available with a Creative Commons license. You're also able to limit a query to find content available for commercial purposes and/or content that can
modified, adapted, or built upon. Most of Yahoo's advanced search syntax appears to work. More in this post.
According to a Yahoo spokesperson, this is the largest one-stop search tool on the web to find material with a Creative Commons license on the web.
Btw, the Creative Commons site also offers a search engine that's powered by Nutch.org open source technology.
Any content creator (photographer, musician, blogger, etc.) can share some or all of their work with others using a Creative Content license. Think of it as a more flexible type of copright license. 11 types of CC licenses are available. If you're not familiar with how it all works, this page provides a great overview.
From the Yahoo news release:
The launch of Yahoo! Search for Creative Commons is an important step in a broader movement to enable people to find, share and expand content within a new, more flexible set of copyright laws that ultimately enable the creation of a ?remix? culture and new generation of creative works."
Postscript: Chris wrote about the Creative Commons a couple of weeks ago, describing the mission of the organization and how to find content using its open-source search engine in Finding Free Content in the Creative Commons.