All Things SSRN
SSRN supports the Open Access movement. All scholars may submit papers for free, and author-submitted content is downloadable at no charge by users world-wide.
SSRN is a network of networks, that is, it is divided into specialized areas including cognitive science, information systems, marketing, negotiations, poltical science, and social science. What you may not realize is SSRN includes the humanities as well (classics, English & American literature, and philosophy research networks).
If you are interested in submitting your own work to SSRN there are instructions on the site complete with a video demo.
But it gets even better because SSRN now has a very cool free app for iPhone and iPad users which enables you to search the Archive's over 260,000 papers (and growing) from anywhere. Papers can be emailed or viewed directely on your device. iPad users can download documents and annotate, etc. as well.
If you can't get enough of SSRN, you can also subscribe to their twitter feed (twitter @ ssrn) and their blog.