Can't you simultaneously release your article on an open access journal (or your own site) when it is published with the paid journal?
Excuse me, I misspoke. I just went back and read my most recent copyright transfer agreement. It states the journal owns the copyright to the specific article, even though the authors retain rights to the data themselves. There is a specific exception for authors to send individual copies to colleagues, provided no money changes hands, but publishing the article directly (in print or online) is prohibited.
This system is not long for the world. Enough people hate it that it will collapse soon. In the beginning online only journals, especially open access ones, were looked at as the ghetto of academic publishing. These days there are several that people take very seriously. PLoS One (and all the family of PLoS journals) is the most famous, and I really respect what they do. I think you'll continue to see these grow until they just take over. To paraphrase Max plank: There are no scientific revolutions; the older generation just eventually dies.