There's a new site called Phygg.com that is a cross between the arxiv physics feed and Digg.com in that you can read papers up for prepublication and then vote them up or down. I think this poses an interesting new step in peer review and academic journals in that it gives the public a chance to participate in reading and voting on papers. From there, the journals can separate the wheat from the chaff. While it's not exactly innovative (digg + arxiv = phygg), it'll be interesting to see if people take to it and how good the general public will be at reading lengthy physics papers. MIT's Tech Review has a short blog on the launching.