Google's New Web-Browser Chrome has a very cool list of secret commands that share the users data with them selves, displaying how the browser, page, or other data currently is..
Here they are:
you can also go to two special pages on a
per-site basis.view-cache:[URL]shows you some under-the-hood cache details, and
view-cache:[URL]shows you the page's markup.
Just found this out from lifehacker he does a great job covering this topic, with screen shots, if you are intested just type any of these commands in the URL Box of the Chrome Web-Browser and you will see some special about pages.