Well, there are many reasons to move production out of Japan. I highly doubt Nikon moved the production of the lens because of the disaster. It takes extensive planning to set up a production line, plus redirecting logistics, customs and legal matters. If Nikon moved the production, they'd have planned for it long time ago. There are cases of products with initial production run in a certain country first, then continue at another location. Mostly due to readiness of the eventual location as well as schedule restrictions. However, of all cases I've known, they are planned, not due to unexpected changes.
Anyways, I need to live around more bugs(roaches not included but they are already all over the house) to justify buying this lens.... or may be not?