A collection of independent, reusable Django apps: Basic Blog, Basic Places, Basic People, Basic Library, and Basic Profiles.
( via Reddit )
My paper copy arrived last Monday and I enjoyed reading it. I much prefer reading a physical book, but it's great to have it available online, too.
How to inherit behavior for model classes, not the models themselves. I'd just been playing with doing this a couple weeks ago, for the exact same reason: to override Model.delete to hide an entity, not delete it.
Utilities for implementing Modified Preorder Tree Traversal (MPTT) with your Django Model classes and working with trees of Model instances.