PyCon 2013 talk ideas

Adding to the talk ideas started by Danny Greenfeld:

• A survey and comparison of Python graphing/charting/visualization libraries: there's matplotlib, Chaco, PyChart, PyGoogleCharts, CairoPlot, ... It's hard to know how to choose. (StackOverflow discussion of Python charting)
• A more general comparative talk could just look at 2D graphics: Cairo, ReportLab, PySVG, PyX, the Tk, GTk+, and Qt canvases, etc. This idea actually comes from my list of possible books, so it may be impossible to cut the topic down into a 30- or 45-minute talk.
• Or 3D graphics: OpenGL, VPython, plus game engines like PySoy and Panda3D.
• An introduction to TCP/UDP sockets using Python. (A novice-level talk; I wouldn't attend myself, but I think it would be popular.)
• Another one from my talk-ideas list: a historical survey of free software. Judging by Hacker News, there are lots of people around who don't know the background that led to the FSF, 'free software' vs. 'open source', etc.