There should be a mining guild, or some way to mine, to go along with the recently added woodcutting guild and woodcutting/resource gathering.
Forest like areas wouldnt be very good to mine in, though places like golemus, necrovion, and hopefully the underground tunnels under MB (since my role puts me in that area).
You would be able to mine different types of ore of course, maybe fossils, lost equipment... anything youd think you can find in a chunk of rock. This stuff would be used to make equipment, enhance your creatures, stat boosts, etc...