Japan Nuclear Update
The NY Times has a very good page showing the current status of each of the six reactors. All of them remain problems in one way or another, either because of the reactors themselves or the spent fuel. The Post also has an interactive, featuring an animated presentation. No one seems to expect a full resolution any time soon. The radioactivity releases are troubling, but every day that goes by without a complete melt-down or other disaster should probably be considered good news since it means more time to get the situation under control.
UPDATE: Radiation levels are continuing to rise, a worrisome development. Look here for more information