I find these kinds of projects very interesting. It is just too bad the site does not talk about the technology they use (or maybe I am just not seeing it?).

I am interested in this because I have recently been working on simulation studies of large Ad Hoc networks where we look at the B.A.T.M.A.N protocol. It was originally built for use in the Freifunk (https://freifunk.net/en/) network in Germany which is similar to Project Waves.

Its fascinating what a bunch of nerds with a mission can put together.