codefetch is a website that allows you to search the code contents of your favorite techie books. It looks as though it actually searches the zip, or tar.gz files provided by the publisher. You can search for, then find the snippet from your book, displayed in some pretty formatting along with highlighting. You can then download the entire book's code examples.
So far it looks as though, Perl, PHP and Coldfustion have the most documentation.
I give this site 5/5 stars.