An AP article ran yesterday -- Scientists See New Global Warming Threat by Seth Borenstein. It highlights this week's Nature article by Walter et al. on findings re: carbon bubbling out from the permafrost.
I found the article's tone to be alarmist, starting with the first line: "New research is raising concerns that global warming may be triggering a self-perpetuating climate time bomb trapped in once-frozen permafrost." But Borenstein was working with direct quotes from scientists.