Actually, it's been up for at least a week, but I was out of town at JavaOne (and too tired to post), then off the grid completely taking my son's school to camp. I'm still getting caught up, but nearly recovered.
I think I've figured out why my new blog is not being picked up by Planet Python too: the planet software has only recently begun to support Atom 1.0, and that version hasn't been officially released yet. There should be a 1.0 release of the planet code soon, and hopefully Planet Python will upgrade then and all will be well with the world.
I guess that's one downside to developing my own blogging tools to support open standards: I may not have to implement deprecated formats or protocols, but if others are still stuck with legacy systems it can still hurt.