Well, PyCon AU 2012 was definitely the best Olympics ever. The quality of the talks was outstanding, and the event organisation went flawlessly. Kudos all around.
I presented twice, videos available on YouTube:
"Visualising Architecture" : http://www.youtube.com/watch?v=BGOtqXA_y1E
"Virtual Robotic Car Racing with Python and TORCS" : http://www.youtube.com/watch?v=BGOtqXA_y1E
Visualising architecture presents some useful tools you can use easily for examing codebases and running systems to show the internal structures, and includes some discussion on good design in context. Robotic cars is pretty much as the title indicates. Thank you to everyone who showed up, sat through them, and special thanks to those who asked some great questions at the end. Speaking is a real pleasure when the audience is happy to talk afterwards.
Other talks I attended (and would recommend) were:
"What to buid. How to build it. Python can help!" by Mark Ramm. A great piece on, essentially, good management practises utilising evidence-gathering to make decisions. Presented examples based on product management at sourceforge. People should do this more.
"The Lazy Web Dev's Guide to Testing Your Web API" by Ryan Kelly. Ryan is a great speaker, and he showed some good techniques for reducing the amount of effort in testing web APIs.
"Python Dark Corners Revisited". Definitely worth a watch for anyone working with Python. A good explanation of Python's types and data structures, presented as a bunch of surprising and challenging short questions and explorations in Python.
"Funcargs and other fun with pytest" by Brianna Laugher. Everyone should know more about testing, py.test is a great tool, and the presentation was very practical and includes applied real-world examples and problem-solving.
"Python Powered Computational Geometry" by Andrew Walker. A great exploration of tools and techniques for representing and visualising 3d objects. Cool!
I didn't see, but plan to watch later, a couple of the other presentations. I'd also queue up "Think, Create, and Critique Design" by Andy Fitzsimon (video not available, but use Google to find the slides he posted); and "An unexpected day" by Aaron Iles.