Rosie Redfield, who very quickly challenged the announcement that GFAJ-1* could use arsenic as a substitute for phosphorous in its DNA backbone, has now published her research. The result appears to contradict the original work by Felisa Wolfe-Simon et al., but since it's only a blog-post we'll have to wait for peer-reviewed publication for the next chapter of this highly interesting science "Whosynthedit." As Bob Zimmerman correctly reports, it'll be interesting if Science refuses to publish on the grounds that the world of bloggery got the news first.
This blog had some fun with Richard Hoagland's hilarious failure to comprehend the original announcement in December 2010, under the title Tiny bacterium defeats pseudoscientist. It took my breath away when he said "This marks the first time NASA has grappled with the concept 'What is Life?'" It seems that, to him, the entire history of NASA's Mars mission planning since Viking in 1976 just never happened.
* It actually stands for 'Get Felisa A Job.'