Story just broke on TechCrunch.com. I tried to go to all of the sites and have confirmed these are all down. This is a major attack on some pretty serious government sites. I find this unbelievable. Here is a excerpt from the Tech Crunch story:
Following calls for an investigation into the prosecution and recent suicide of internet activist, Aaron Swartz, MIT’s website is currently down. MIT’s President L. Rafael Reif today called for an investigation into the handling of the case brought against Swartz for his release of pay-walled academic papers from popular database, JSTOR.