Quoting Virgil Griffith i@virgil.gr:
Roger et al, I'm interested in something like onion-pi to be a Tor relay. Is there something with enough COU to be viable? I know nothing about this embedded scene.
-V
These are all PI:s https://atlas.torproject.org/#search/dfripi running the image from https://github.com/DFRI/dfri-rpi-tor .
Not super fast, but useful IMO.