[pypy-dev] Percentage Python as RPython.

[Hart's Antler]

Todd,
I think you want a frontend, not a backend.  The frontend would take in normal Python and convert it to RPython.  RPython seems to have infinite meta-programming possibilities, so its just a matter of how hard would it be to make the meta frontend.  Probably too hard since python is so dynamic, but maybe its possible with a new subset of Python halfway to RPython, developers would then only have to port to Not-So-Restricted-Python, and then the frontend does the final job of converting to RPython.
-brett