I have started an experiment to highlight Open Access content that is being reused on Wikimedia projects by way of Wikimedia Commons.

The files that have been featured so far are at

http://commons.wikimedia.org/wiki/Commons:Open_Access_File_of_the_Day ,and you can nominate files via http://commons.wikimedia.org/wiki/Commons:Open_Access_File_of_the_D... .

Feedback on the procedure is welcome too.