Collaborative data and graphing site Swivel (blogged here — copyrightable elements are under CC Attribution) now features a dataset mapping the growth of CC licensing at Flickr over the last eleven months:

Photo: Franz Patzig / CC BY

Explore 33 million CC licensed photos at Flickr.

Challenge: add datasets for other CC enabled content repositories to Swivel.

Updates:

Beth Kanter remixes.

Swivel explains.

Jared Benedict writes about gathering the data and also making it available in tab delimited format and as a Google spreadsheet.

Another challenge: Gather older data points from http://web.archive.org/web/*/http://flickr.com/creativecommons. In October 2004 there were fewer than 100,000 CC licensed images on Flickr.