We have been working on some optimizations on the backend lately, and one thing discussed was a new approach at handling caching. Django offers several, none of which satisfy what a heavy database site needs, and calling cache.get() everywhere is just...
We recently added support to Django's ORM for the "GROUP BY" SQL term. Although the patch wasn't accepted into trunk, we figured others might find it usable as well, so here you have it: http://code.djangoproject.com/ticket/4997...