If you are interested in the evolution of PyMVPA you might also be interested in the following movie. It is a visualization of the activity in the PyMVPA source repository since it first has been published in May 2007. The movie is generated with tools from the code_swarm project.
In the movie, each file in the PyMVPA sources that is changed appears as a particle on the screen centered around the name of the developer that contributed this change. The colors indicate which part of PyMVPA the respective file belongs to (see the legend on the left). The animation is regenerated every couple of weeks to include the more recent commits.