I gave two talks at the SciPy conference: one on my particle tracking wrapper code, TracPy, and another on people's perceptions of matplotlib colormaps.
The talk on colormaps was in the visualization and imaging mini-symposium at the conference. Damon McDougall first gave a talk about choosing a good colormap before I gave my talk that was specific to matplotlib colormaps.
How to Choose a Good Colour Map | SciPy 2014 | Damon McDougall
Perceptions of matplotlib colormaps
Perceptions of Matplotlib Colormaps | SciPy 2014 | Kristen M Thyng