This is a machine that gives you lapis lazuli, through minecart rails, note blocks, and villagers. I built it when I was bored. Check it out, and if you like it, feel free to give a diamond!

PS: You will need to reset the machine when you've used it. The pictures explain how. You must kill the villagers before putting the minecarts in their positions.

I used CrEaTiVe_ONEs Medieval pack in the screenshots. Link:http://www.minecraftforum.net/topic/1202935-64x12-5-12w18a-creative-ones-medieval-pack-12-v5-12w18a-updated-8-5-2012/