[onesun]

Came to say this. I wonder if this hack is widely known, because it seems like this is a pretty clever way to use the Pi Zero in some applications that would be better served with a multi-core processor and don't require the GPU for video tasks. Hacking the Pi Zero to be a dual-core system essentially.

[b3lvedere]

Could four Pi Zeroes become a Pi 3? :)

[shakna]

Clustering the Pi has always been fairly easy [0].

[0] http://www.southampton.ac.uk/~sjc/raspberrypi/