I have recently found an abandoned mineshaft going to the east of spawn in SMP2 wilderness. I have walked through it and havent found any chests BUT there is still plenty of resources on the walls so it tells me no one has been through it besides me. I found it when i was out of pickaxes and left without doing much. Feel free to find it! I didnt find any cave spider spawners (dont know if there are any in multiplayer). There is still plenty of planks and fences. I took maybe 8 of the torches but there are still enough. I would say its close to 1000 spaces east. Maybe more. But its a good distance from spawn. If you see a tree with a sign on it and sort of a labyrinth if you continue down the stairs, it means your on the right path it shouldnt be too much farther. The entrance to the Mineshaft is my own mine (2 wide if my memory is correct) there should be torches going down my mine unless someone has already greifted it.BTW if this is in the wrong section please tell me where it should be. Im new here and am still figuring things out. Thanks!