Thanks to all those who commented on the Open Access post. The comments lead me to a rich thread on the same theme, which I was not aware of, at the Leiter Report from 2006, which everyone should read.
Though my post has had many viewers, thanks to a link from Brian Leiter there has been no stampede of senior professors signing up to take The Pledge. The heroic exception is Rick Grush who declares himself a "Commercial Free Philosopher" and invites others to join him and show support by posting his logo. Grush's manifesto "Why I am a Commercial Free Philosopher" is sound and eloquent and should be read by everyone interested in this theme.