This is a pretty neat census data web site. I don't know of it's
reliability or anything ... but thought I'd share it anyway.

After entering a main zip code and getting the first page of results ,
there's a table toward the bottom where one can enter zip codes of 19
other locations and get comparison information.  The results page also
includes a map showing the geographic center of the area queried.

Angie

www.ZIPSkinny.com <http://www.ZIPSkinny.com>