I'm still waiting to hear back from the PEP editors. The older code linked to in the archive here is no longer valid (the URL won't even work ;). If you want to try submitting information these days, go to the PyPI interface and click on "package submission". If you don't have a login, you'll have to create one. Once there, you can choose to download the latest register command module or manually upload information.
If you haven't looked in on the interface lately, I've cleaned it up significantly and added several new features. Unfortunately, users who aren't me (and don't want to apply the distutils dist module patch I've created) will have to wait for python 2.3 to submit Trove classification information ;)