Interesting development. (Thanks to Michael Weisberg for the pointer.)
Of course, there's isn't quite the same demand for prior "philosophical results," but arguably this isn't wholly irrelevant, especially vis-a-vis publishers that charge extravagant fees for journals (like Springer).
UPDATE: I didn't notice the linked article, above, is from 2001. Sorry about that. Rachel Barney (Toronto) points me to a 'live' issue, the organized protest against Elsevier.