For straight, expert, scientific, plain-talk about the nuclear reactor issues in Japan, you can't get any better information better than the web site of Nuclear Science and Engineering at MIT.
Go here: http://www.mit/nse
Beyond Automatic Mode
Founded 1943
Old Posterous Blog
These blog postings were imported from the Posterous service before Posterous closed down. Posterous was acquired by Twitter in February 2013.
A new blog service has come on the scene, Posthaven. The developers are the same as those that started Posterous. Their promise for Posthaven? "Websites come and go. This one is made to last forever."