Nothing new I can find on the Union of Concerned Scientists website.

Here're two short news releases from NIRS (Nuclear Information Resource Service):

"UPDATE, 4:30 pm Tuesday, April 5, 2011. Japan's NHK TV is reporting that a plant worker at Fukushima Daiichi says that radiation levels inside the reactors buildings of Units 1-3 are "immeasurable"—so high that their radiation monitors have been rendered useless. The report states that levels of 10 rems/hour have been measured even outside the buildings.

UPDATE, 11:00 am, Tuesday, April 5, 2011. The Los Angeles Times is reporting that radioactive Iodine-131 has been measured in seawater near Fukushima at 7.5 million times the legal limit. Perhaps even more worrisome is that radioactive Cesium-137 has been measured at more than 1 million times the limit. The Cesium is likely to lodge in sediment in the region and remain a factor for marine life and fishing for perhaps centuries.

Fish caught in the region already have been measured with excess cesium levels. In response, Japan has established its first standards for radiation levels in fish. Close tracking and monitoring of sea currents and radiation levels will be critical."

Charley Noble