If only this were in English, I could get out of the business of keeping the guide up to date. But even if you don't read Portuguese, the maps and info re elevation gain may be useful. Actually, this website, dedicated to the Caminho Central (Lisbon to Porto, I think) is chock full of information.
http://caminhocentralasantiago.blogspot.com/p/guia-caminho-central.html
There is also a Spanish language version for those of you who read Spanish.
http://caminhocentralasantiago.blogspot.com/p/guia-caminho-central.html
There is also a Spanish language version for those of you who read Spanish.