The New York Times has created a small slideshow of maps and photos of the Fukushima Daiichi Nuclear Plant. It's very useful to get a better idea of the layout of the plant (where the 4 reactors are), of where it is in Japan and how far from the Earthquake's epicenter that is, and what the chronology of the main events has been up to now. It also shows how big the evacuated area is.
Check it out: Accident at Fukushima Daiichi Nuclear Plant
We've also created a couple of mini-FAQs about the nuclear crisis in Japan: Mini-FAQ About Japan's Nuclear Power Plant Crisis and 6 Important Questions About the Crisis at Japanese Nuclear Power Plants