The Privateer Theme for WordPress offers a localized backup system which can be used to create, save, and share different looks with other users. This functionality is called Quicksets within the privateer.
Basically, you can save your current options ( and optionally include screenshots ) and then share them with others or return to using them later if you want.
This enables the ability to drastically modify the look of your site with only a few clicks. It also allows one to work on layouts locally and then apply them to remote systems once you are satisfied with them.
As time goes on, quicksets beyond the initial ones will be available in the Owner Extras and Full Owner Extras forums to those who have paid for a copy of the privateer theme.