I had this idea to make a tool kit that would allow for rapid development of a website prototype while creating a working site complete with documentation and wireframes.
Well Yesterday I some how stumbled across ProtoKit from Konigi.
Protokit is a toolkit for creating HTML prototypes. It uses the following open source libraries and plugins: Blueprint, jQuery, jQuery UI, jQuery Templates, and iXEdit. More information about the included libraries and their licensing agreements can be found in theREADME file.
I must say that looking at it (not having used it yet) is exactly what my plans entailed. I look forward to an afternoon and some exploratory time.
http://konigi.com/project/protokit