That last awesomeness is SIGOPS: They bought out the copyright for all papers at SOSP'13 on behalf of the authors. three cheers. All of the SOSP papers are available -- already -- open-access: http://sigops.org/sosp/sosp13/program.html
(For the non-academics: SIGOPS is the chapter of the ACM for operating systems. It runs SOSP and similar things.)
(For the non-academics: SIGOPS is the chapter of the ACM for operating systems. It runs SOSP and similar things.)