Ore-wise, it's Coal. But stone, is (obviously) the most obtainable material.
Underground
i think methane is found underground and most metals
There is no word yet as to how Darkrai will be obtainable. Most likely it will be through some sort of real world event.
Abandoned mineshafts are randomly generated, so just look underground.
Corporation piping class 22 or stronger is recommended.
Most famous Minecraft is probably 1.1 version.
Foxes are not in minecraft.
The yogscast are one of the most popular minecraft videos
You are most likely in a Mega Taiga biome. It consists of a lot of mossy cobblestone boulders. If you are underground, than you have found a dungeon and can now farm mobs for a lot of exp.
In huge underground lakes and rivers. Also, underground the Earth.
Modloader, Modloader MP, and most Minecraft mods are completely free. You can download most of them at the Minecraft Forum.
The primary work of the diamond miner in most of the underground mines involves drilling holes to set charges, doing the blasting to loosen material, gathering up the material and then getting it into the hoppers to get it to the surface for processing.