I've put a version 0.3.6 of the Python Policy Draft on http://people.debian.org/~flight/python/. The version is still a little bit rough and sometimes incomplete, but it already gives a good outline of the Python packaging system we are installing just now.
Please have a look at the document, and post all fundamental problems you have with the content. If nobody find fundamental show-stoppers that render this unusable, we're going to submit it to Debian Policy very soon. Gregor