A client's mobile site: http://m.clearchoiceantifreeze.com/
Two big ones: http://m.microsoft.com or http://m.twitter.com
This web site of course: http://m.1-2-3-design.com
(The above web site URLs are meant for the use on your cell phone, iPhone or handheld, but of course, you can check it with your website browser right now :-)
On your cell phone, with much smaller display, it will look like the animation on the left.