I've always been fascinated with JavaScript-based style switchers, like those at A List Apart and Netscape DevEdge. It's fun to have a (limited) amount of customizability, without having to reload the webpage like those done using server-side scripting. It's like a shiny toy for your users to play.

I got myself one of those using Paul Sowden's Style Switcher and following the (simple) instructions at his A List Apart tutorial entitled "Alternative Style: Working With Alternate Style Sheets".

And so, redemption in a blog now sports a new Default style and a Clean style, along with the Original style.