JavaScript-based field rendering and saving

One of the ideas we talked about during hack days was JavaScript-based field rendering and saving.

As a Fieldmanager user, it would be cool if I could opt a given field into JavaScript-based handling. My field definition and original data would be loaded into the DOM on the initial page load. Fieldmanager would then create my field on the fly from the definition. The field would be present in a form that could be traditionally saved, or saved in realtime via AJAX.

In fact, this implementation would also greatly improve the existing "Add Another" feature by introducing configurable JavaScript templates, instead of manipulating a prototype DOM element.