I copied this entire blog from Depleted Cranium. Like drbuzzO says, I can't keep up with the misinformation coming out of the press. He says the Japan Atomic Industrial Forum is THE primary source of information about the Fukushima reactors.
TEPCO Press Room – Frequently updated English language press releases from the plant’s operators on the latest state of the reactors.
MIT Nuclear Information Service – Blog-style posts providing expert analysis and information written in layperson’s terminology with good explanations. Highly recommended. Rational and direct.
International Atomic Energy Agency – Contains regular press releases on confirmed information relating to the Fukushima reactors. Also provides information on confirmed injuries relating to the nuclear plant. At this time there are no confirmed cases of acute radiation poisoning, though workers have been injured in the explosions at the plant.
Japan Atomic Industrial Forum (English Language Site) – Frequent updates on status of reactors. This site provides some of the best primary information as soon as it is avaliable on both the reactor conditions and efforts underway to address problems. This is the primary source of information used to provide the concise “Status Updates” updates, which are hosted by HPS.
(note that this is not a “forum” in the sense of an internet discussion board)
Health Physics Society – In addition to having updates on the Fukushima, HPS is by far the best site to go to for reference information on the health effects of ionizing radiation, the measurement of radiation, safety issues and other important background info. HPS provides exceptionally well-written and understandable references for media and laypersons.
Fukushima Status Updates – Provided by the Health Physics Society and the Japan Atomic Information Forum, this PDF document is updated whenever new information on the status of the reactors become available. As of this writing, three reactors are severely damaged but stable. All reactors at the nearby Fukushima-2 plant are safe and relatively undamaged. This document offers the best concise rundown of status.