This is a pretty old project with a basic PCB consisting of an atmega168, enc28j60, voltage regulator and the physical connectors. I've successfully used to board to transmit basic Ethernet packets.
The current status of this repository is very unstable and the committed code is likely to be part of testing, so don't take it too seriously ;) Currently the main files are in a very unstable and testing state, but that might be fixed soon.
Some of the Ethernet pins need to be patched since they wired wrongly. This is likely to be fixed when I order a proper PCB, someday.