Some of my past talks. The most recent ones are just HTML. You'll need to checkout the repo and open 'talk.html' in a browser. For talks before 2011 they are in some other format: 2011 was generated from a ReST doc but needs the program "Bruce" to run.
Stop Writing Classes (PyCon 2012)
pycon2012/talk.html http://pyvideo.org/video/880/stop-writing-classes
Deleting Code is Hard and You Should Do It (PyOhio 2012)
pyohio2012/talk.html http://www.youtube.com/watch?v=Ajln82vwycs
Useful Namespaces (PyCon 2011)
cd pycon2011/ && make http://pyvideo.org/video/395/pycon-2011--useful-namespaces--context-managers-a
Class Decorators: Radically Simple (PyCon 2009)
https://www.youtube.com/watch?v=cAGliEJV9_o
Some others I don't have handy on my laptop but might upload later: 'Python's Dusty Corners', 'Writing Your Own Python Types in C' ... that doesn't feel like a full list but I can't think of any others.