Planet Python and Planet Zope have been announced this week.
My "Slices of Py" made the Planet Zope list, yet not Planet Python one. *shrug*, email sent.
I concur with Roberto Alsino that these groups need to define whether they're about a community or a topic. Many bloggers (/feeds) contain many "off topic" entries. Some of these bloggers have sub-category methods to narrow the feed, others don't. Those that don't and rarely post a topic based entry should be pruned from the list or re-trench with a blogging engine or scraper that does. Those that do, please email the admin with your focused feed. Examples upon request.