Nobody emailed me revealing that they found the hidden object. To be fair, there wasn't much time, it was around the holidays, and people are busy. I should look at the server logs to see how many people actually downloaded the sample PDF containing the payload.

I believe that most listeners consume HPR from RSS and never see shownotes (and all of my subtle hints that there was more than meets the eye about this mini-series were only in shownotes).

Anyway, it was a fun experiment, and interesting data about both steganography and the PDF format.