This is a machine that allows you to get tons of sand without ruining deserts and duplicate enderdragon eggs.Just pull the lever,wait a few minutes and you'll have several stacks waiting for you to pick them.It will most likely not work in 1.5,since the main purpose of this update is fixing redstone glitches.It is test137e29 who discovered it.It's a schematic file for Mcedit,so just download it and enjoy!

Update: Doesn't work anymore since the Redstone Update and I haven't heard of any fix.Sorry!