The first issue of Rejecta Mathematica, an open access journal that publishes papers that have been rejected by other math journals has been published.
Here's an excerpt from the announcement:
We are pleased to announce that the inaugural issue of Rejecta Mathematica is now available at math.rejecta.org! To recap our mission, Rejecta Mathematica is an open access, online journal that publishes only papers that have been rejected from peer-reviewed journals in the mathematical sciences. In addition, every paper appearing in Rejecta Mathematica includes an open letter from its authors discussing the paper's original review process, disclosing any known flaws in the paper, and stating the case for the paper's value to the community.