I'd like to give a talk on the SymPy. It's probably the least well-known of the SciPy packages (so it's time to show it some love). It's a symbolic computation/Computer Algebra system in the same vein as Mathematica or Maple.
John has 13 years of experience as a programmer and consultant. During this time he has done Java programming, XSLT and XML schema definition, Palm OS development, Extract Transform & Load (ETL) programming, process automation, reporting, data conversions, and Django development.