If you saw Erik Knutzen's post on How To Build a Backyard Chicken Coop and you'd like more design ideas, check out this resource for inspiration.
Backyard Chickens is a great resource for those wanting to raise urban chickens. Not only do they host photos of inspiring coops, many of the coops have construction plans and building photos to accompany them. They also provide information resources (like their article "Raising Chickens 101").
Some of my favorite coops from the Coop Design section on the site are pictured above (left to right):
• Urban Chickens: A Photo Show by Todd Parsons
• How To Build a Backyard Chicken Coop