So the first thing I did in 1.6 was to start a new world with a random seed in survival to try out horses. The first thing I noticed was a ton of horses and a villager. As the chunks kept loading I started walking toward the villager and there was a mis-spawned village in the ocean.
This is where I started finding stuff.
I started with a bonus chest and there is a spawner like five blocks below the lower tunnel at a cave at: x: 321 z: 274
There is a saddle in the chest of the dungeon and so you have a house built for you and you can immediately get a horse. There are emeralds everywhere so happy trading.
The cave is here:
If you use this seed please post what you find. Happy survivaling. Hope you use it.