Many wordpress developer sites offer theme previews. Some just use a standard plugin that lets you toggle between themes, using the same content on each. But other, more professional sites like rockettheme.com, elegentthemes.com etc etc, actually have true previews with individual posts and settings specific for that theme.
Is this just done using wordpress MU and setting up a new MU blog for each theme? I would like to set something up on my development server so I could quickly preview through the themes I have or link them to a client as style indicators, without actually setting up a new install for each individual theme (since so many require specific setups or category selections). Does anyone have any pointers as to how this is accomplished?
Again, I'm not talking just a standard switch the existing theme with another, I'm looking for posts and everything. Sorry if this isn't the right place to post this since it's not flat code related, hope this is ok.
Example links:
http://elegantthemes.com/preview/eStore/
http://www.elegantthemes.com/preview/Minimal/
http://test.nattywp.com/?preview_theme=Delicate
http://test.nattywp.com/preview.php?theme=bongo