In a previous post, I recreated an infographic using the Chaco plotting library. Inspired by Peter Wang's lightning talk (scroll to about 5:15 in the video) at the recent SciPy Conference, I've extended this idea a bit to show the exploration of a "4D" data set (three axes and the color/size of the points) and using a 5th dimension (the date) as an interactive filter.
Since it's a whole lot easier to demonstrate than to describe, I made a short screencast of me playing with it:
While a bit hackish, the code is available for anyone wishing to play with or improve it.
I know I've said this before, but it bears repeating -- Mayavi is awesome.