When I first discovered Naked Objects, I thought about a Python implementation that used RDF to provide the schema. What I wasn't sure about was how best to mix use of Python objects for the instances with RDF for the schema.
The answer could be mnot's sparta.
Sparta itself doesn't make use of the schema module in rdflib but a Naked Objects implementation could be built on top of Sparta + the schema module.
The schema module lets you do things like ask what properties are allowed on a given resource and what values those properties can take. (Actually, it doesn't appear to do the latter anymore - I'll have to ask eikeon why that dropped out of our original code). The generator-based version of the schema module is certainly a lot cleaner than the original code eikeon and I wrote three years ago. One of us should write up a side-by-side comparison of before and after.
So another little project to add to the list: a Naked-Objects-like generic UI on top of sparta, using the schema module in rdflib to control property domains and ranges. The result would be pretty close to a rich-client version of the original generic viewer in Redfoot.