How Crowded is Gaza?

Like almost everyone who has written about the Arab-Israeli conflict, I’ve described Gaza as one of the most densely populated places on earth. It’s one of those “media facts” that get mindlessly repeated because it has been printed so many times it seems true, like it’s the sort of thing everybody just knows.
Maybe it’s time to lay this one to rest.
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(Thanks to “Roger L. Simon”:http://pjmedia.com/rogerlsimon/2009/12/07/middle-east-mystery-of-the-day-just-how-crowded-is-gaza/ for finding this video.)
UPDATE: “Martin Kramer has more”:http://sandbox.blog-city.com/shrinking_gaza.htm, including interesting visiual comparisons of Gaza to New York, Paris, and London.

1.5 million people live in Gaza. How many more millions do you suppose live in the Gaza-sized space in New York shown above?