Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
PseudoGrey
Algorithm allows accurate encoding and decoding of 1786 levels of grey within a 24-bit image; text overview, sample images, and a Java test program can be found at this site.