Updates:
http://www.nakedcapitalism.com/2011/...ar-update.html
Of particular interest to me was the Science magazine article indicating that concerned Japanese scientists were doing their own radiation monitoring:
"It shows one wide belt of radiation reaching 225 kilometers south from the stricken reactors to Tokyo and another extending to the southwest. Within those belts are localized hot spots, including an oval that encloses northeast Tokyo and Kashiwa and neighboring cities in Chiba Prefecture."
Unfortunately the original Science article is behind a paywall.
Another site with roughly weekly updates:
http://www.moonofalabama.org/2011/06...e-june-18.html
If you want to know how some analysts were putting together the reported facts in the early stages of the incident, read the earlier updates from Moon Of Alabama.