Well it's a windmill what to say? It goes well with farmland =)

UPDATE:
I've put world download (schematic in package)

Also I made second version of this: www.planetminecraft.com/project/dutch-type-windmill---server-version/

Please comment which version do You like better.

Additional Notes

Blocks used:
4346 Planks
853 White Wool
304 Wood
210 Fence
112 Iron Wood
65 Stone
55 Cobblestone
53 Glass Panel
48 Wooden Stairs
23 Glowstone
20 Torch
12 Ladder