Chickens, anyone?

Chickens. I am obsessed with the idea of incorporating chickens into my mini-farm. (I've started using this term for my garden-to-be, as it seems more accurate, as I'm planning for veggies, fruit plants, bushes, and trees, ornamental plants, flowers, and chickens.) I'm currently researching coop designs. The plan is 4-6 hens, breed TBD. (Maybe Silkies, which are beautiful as well as functional!) Free range won't work, with limited backyard space to work with, so a coop and run it is. The website www.backyardchickens.com is the go to place for sharing designs. And this book has been a wonderful resource as well:

Any chicken advice for me? Designs you've found that work well (or not so much), tricks of the trade, I'll take all the help I can get!