Google Earth is getting an audio layer. Bernie Krause has been recording the planet for 40 years. He has released part of the collection under a Creative Commons license, for listening on Google Earth.
Tim O'Reilly has published a lot of books... I've been buying them since the 80's. Now he's written a case study of sales vs. free downloads for one of his titles. The free downloads are under a Creative Commons license.
Larry Lessig says in this interview, that there are now over 100 million objects licensed under a Creative Commons license. He participated in a panel discussion at the recent "copyright summit" in Belgium.