At present, in terms of radiation risk, the tsunami appears to be a wash: on the one hand there’s a near nuclear meltdown, on the other hand the tsunami disrupted something really dangerous: international flights. (One does not ordinarily associate flying commercial airlines with elevated radiation risks. Then again, one doesn’t normally associate eating bananas with it, either. When you hear news reports of people exposed to radiation, keep in mind, at the moment we’re talking a level of severity somewhere between “ate a banana” and “carries a Delta Skymiles platinum membership card”.)
The level of preparedness in Japan is incredible, and saved thousands if not millions of lives.