I am totally puzzled ... Futon is a simple management app built with, among other things, jQuery. Abstracting Futon to allow switching of multiple client-side libraries seems like a strange thing to focus on.
Anyone making a web application these days MUST be using a cross-browser library of some description, and jQuery has the distinct advantages of being lightweight, extensible, widely used in production, and excellently documented. CouchDb itself has a solid, well-documented RESTful API. If there is an ongoing issue, the API allows anyone to build a management system using whatever tech-fu they do posses.
