An interesting mix of information here. Some independent sources of radiation monitoring readings here:
http://www.radiationnetwork.com/ I think the site has gone on and offline a little bit so if it doesn't work it's probably getting more traffic than it can handle. That's why the webpage looks so simple and is minimalistic - less data to display = easier on the hosting server.
I'm not fearing some huge disaster here in the U.S. but I think the whole thing is interesting for sure. I live about 36 miles from Diablo Canyon Nuclear Power Plant so if I was super worried about the whole thing then I wouldn't be living here in the first place.