My first concern about the link you posted is what it says at the top; "Warning: This article is out of date and should not be used for creating new packages." It then goes on to point to the Debian New Maintainer's guide, which is the canonical, in fact the only reliable, guide to packaging debs. Do begin here since Maemo relies on debs being built first, then modifying the deb slightly to fit maemo.
If you are still getting errors, you can mail me at jeremiah@maemo.org and I'll see if I can help. One of my goals is to create a python packaging howto so maybe we can work on that. :^)