Apparently reactor 1 has fully melted down. Some serious folks think that reactors 2, 3 will do the same. Number 3 is the one with the plutonium. If you hunt youtube, you will find instances of people in the states registering big upticks in radioactivity, like, here: http://www.youtube.com/watch?v=mBcXIEYq9vg
It doesn't take a rocket scientist to deduce that the same PR strucure that went to bat for BP, co-opting the government and blacking out any news about what was happening, is working for Tepco.
Anyhow, both those issues are tangentially followed in an interesting meteorology/earth sciences blog over at wunderground.com; the blog is by the websites founder, Dr. Masters, and he has quite a following in the comment section.... lots of those folks have awesome credentials in their fields. Here's a link to the main blog there, the link to comments is at the bottom of the blog.http://classic.wunderground.com/blog/JeffMasters/
Right now he is focusing on the flood flowing down the Mississippi... apparently things are going to be getting ugly down in the South lands this weekend.