USA Today reporter Dan Vergano obtained the reviewer comments from NASA through a Freedom of Information Act request. Scientists and journalists had heated discussions about what to take away from the new information, and about whether the whole saga came down to honest mistakes.
Another - the authors didn't heed a request from one reviewer. "In order to demonstrate and quantify the replacement of P by As, I recommend isolating DNA/RNA and determining the element ratio," the reviewer wrote. (It is not unheard of for researchers to fulfill such requests in future work, but this reviewer's request seems to be in line with post-publication complaints about the arsenic-based life paper.)
And one researcher posts a link to what he claims might have been the original arsenic-based life manuscript submitted to Science (before any peer review happened). The manuscript is hosted on a server at Arizona State University, home to several authors of the report.