Physical Review Letters recently adopted a system where authors can pay a fee to have their submissions published under a Creative Commons license. The fee replaces journal subscription/paywall revenue.
Oh, sure, Springer will also let you publish "open access" articles. However, the publishing fee goes up from a few hundred dollars to a couple of thousand. Now find me a prof that will actually sacrifice his precious grant dollars for that.
http://prl.aps.org/edannounce/CC-launch-press-release