Since the showcase is low on information, here's a summary of the current status:

- the porting strategy is explained here: https://docs.djangoproject.com/en/dev/topics/python3/

- the porting work happens in the master branch; commits related to the Python 3 port are usually prefixed by [py3]: https://github.com/django/django/commits/master

- the test suite doesn't pass yet, but the hardest part is done: http://ci.djangoproject.com/job/Django%20Python3/

- most of the work happened over the last three weeks, and 5 or 6 core developers are contributing significantly