The seed Fortress for minecraft 1.2.4 spawns you in a forest biome near a desert. In that desert is an npc village near the at X: -272 Z: 356.
The entrance to a double ravine with an abandoned mineshaft sitting on top of it is at X: -178 Z: 4.3 Its a large mineshaft, definately worth checking out. At the bottom of the ravine are some exposed diamonds.
~thanks to smileyguy12 for submitting this seed