I just finished up the first version of my jQuery plugin. I'm linking to the example/demo page below.
(and in the new jQuery plugin list - http://plugins.jquery.com/RoughDraft/
Essentially, it is a way for developers to quickly mockup an interactive HTML page without server side code, duplicating markup, or sourcing for fake content (will do that automatically).
If anyone would like to contribute, I'd like to continue developing it...