I found a cool seed. You spawn near a cave with different paths. One of the paths will lead you to a ravine with some diamonds. I haven't explored the rest of the cave so I'll leave that to you. There are two villages (no blacksmith in both, sadly), a small jungle, a very very small taiga, a mushroom island, and a couple of small islands.
The seed is DEMIP
So... I'm supposed to put something here?