Valcano suggestion

Volcanos
I think Notch should add volcanos to minecraft. Basicly they wold be like hollowed out mountains filled with lava, obsidian, ores, and mobs. i think that it would be cool because it would give players another thing to search for creating more fun. i don't know what it would be but you could even put something really rare and special in them giving players more incenitive to find them. I think that it would be a really good idea and I hope that you might concider it.

Where to find it
Volcanos will be found in mountains in extreme hill biomes. There will be a 5% chance a mountain will be a volcano.

Uses
Volcanos will be used as a good source of ore so they will be helpfull in minning because they will contain diamonds, emralds, and other useful resources.