I've only just started compiling this page - it'll grow as I find more of my presentations online.
These are some presentations I've given that are actually available online:

State of Python keynote at the 2010 EuroPython conference.

The 7-Day Game about writing a game in a week during the Python Game Programming Challenge.

I also lecture at RMIT University and regularly host and speak at the Melbourne Python Users Group.

The pyglet piņata talk co-presented with Alex Holkner at Linux Conf Au 2008.