just messing around I came across a pretty intense seed. Haven't had enough time to fully explore it, but within 20 minutes I found a large village with a blacksmith that has a chest with diamonds and other goodies. Running through the village is an entrance to a massive underground cave.
Extremely nearby the village is a giant ravine with waterfalls etc, and that probably leads to more cave systems. Also nearby the village is a cliff side cave, and it seems to have quite a lot of monsters for a small cave, so I anticipate a spawner inside. Please let me know if anyone uses this seed and finds anything worthwhile
i will update this list with more goodies as I find them, but for now I'll post the coordinates for what I've found so far.
You need more doors for villagers to breed. Enough villagers and iron golems will spawn. Build a 15 x 15 building with doors in place of walls except for corners. Add a block over the doors to be considered a house.