2007.dconstruct.org - style switcher shows progression from wireframe to final design.
Fri, Mar 13, 2009
This was one of the examples thrown out in Paul Annett's session called "Oooh, That's Clever! (Unnatural Experiments in Web Design)". It's the site for the 2007 dconstruct conference that features a timeline of the design at the top of the page that has an easter-egg function as a style-switcher showing various stages of the design. Neat.

