Security-protocols.com runs an interessting article [1] describing methods to use Google to gain access to files you shouldn't be allowed to see or have access to. A broader and more in depth look at the same topic provides the site Serachlores.org [2].

[Update:] Slashdot [3] links to 2 additional articles about using Google (and the Google-cache) to retrieve confidential information.

[1] security-protocols.com [via SecurityBlog] [2] www.searchlores.org [3] slashdot.org