Mashup Shows New Orleans flood on Boston Map

From Brad Feld's blog:

If you know Boston but don't know New Orleans, boston.com has a superb graphic that is a mashup of New Orleans, Boston, and the area that was flooded (Registration required). It's an amazing perspective for anyone that knows the Boston area. The North End, Harvard Square, Brookline, Newton, Wellesley College, and Framingham are all under water. Shoppers World in Framingham is spared, but just barely.

Just to be clear, the mashup shows the size of the New Orleans flood by superimposing a map of New Orleans over a map of Boston, not Boston's vulnerability to such a flood. (The mashup uses a slider to overlay the two maps - a very nice technique.)