Install this on a web server and visit one.html. Click the link on the page and observe that successive pages are loaded through AJAX and the history changed through HTML5 pushstate.
http://cairo140.github.com/html5-history-example/one.html
On some browsers, security constraints will prevent the site from working if served through the file:// protocol. If this happens for you, install a web server and run it there.