Dunno if this has been posted before, but here I go anyway...
Taken from the site:
Welcome to the World Passport Record Records Bureau web site - where you can search our online database of over 6 Billion Passports information currently on file, absolutely FREE. Search our files with the form below.
Under the recent NATO Passport Act (NATOPA - enacted on Nov 2, 2001), every country in the world is required to make available to the public a digitized copy of each and every valid passport issued, in their respective country.
Check if your personal info is subject to public viewing as well