Here we try and collate all of the relevant documentation together. If you find something missing, please put it here. It's a mess, feel free to format it better.
A paper written about mesh scalability by the original author: http://www.cl.cam.ac.uk/~al565/output/teorie/netos/mesh/scalable-mesh-networks-and-the-address-space-balancing-problem-thesis-andrea-lo-pumo.pdf
The original specifications are here http://netsukuku.freaknet.org/index.php?pag=documentation&dir=/main_documentation
And more documents which may or may not be relevant from the c version days are here http://netsukuku.freaknet.org/
A nice guide in Lucas blog http://pyntk.blogspot.co.uk/