August 2010
WordPress › Theme Switch and Preview « WordPress Plugins
it allows you to tweak the template online without breaking stuff for visitors. There is a widget and a shortcode to make switching WordPress design easily.
January 2010
How to Create a Theme Development Environment for a Live WordPress Site – Inspect Element - Web Design & Development Blog
Any good website owner knows that they need to be constantly looking at ways to improve their site even through small little tweaks. If you're using Wordpress you'll notice that it isn't easy to create a development version without creating a separate installation. Of course, you can make changes directly on a live WordPress site but that isn't recommended for anything other than minor tweaks.
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