And the IPython notebook I presented is here.
Mark Wickert was also at SciPy to present a related talk on "Signal Processing and Communications Teaching and Research Using IPython Notebook". His talk is here:
One other update: I sent a proposal to my friends at O'Reilly Media to see if they would like to publish Think DSP. They have responded favorably. We are working on a contract and a schedule, but I am aiming to be done in February 2016, with publication in March or April.