I've just started working on moving Demokritos over to supporting atompub-protocol-06.
I've completed the changes to the introspection document. Next step will be throwing away the old collection format in favour of a normal atom feed. I'll also need to implement support for collection indexing. I'm glad APP defines the manner in which ranges of a collection are accessed because it saves us having to come up with something proprietary for Leonardo.
The original post was in the categories: python atompub leonardo demokritos but I'm still in the process of migrating categories over.