They tried to get it out for freeon the raspi but I guess the uptake was really quite low. Either way the program for that has basically ended. https://www.wolfram.com/raspberry-pi/
The blog post was probably literally written in and hosted entirely on open source software which were highly innovative at their earlier stages and continue to be highly innovative. This is a very self-serving presentation of an idea. Also, I officially dislike the word innovation.