I love high technology and modern components, but there's something special about the juxtaposition of those materials with natural components. These cases from Evutec ($39.95) meet that specification, and then some.
Over the years, I've tried a lot of cases that use wood, bamboo, and other natural materials. Often, they place form over function and don't do much to protect your phone if it falls.
The Evutec cases protrude above the glass in the four corners, for protection where it counts. The case uses real wood veneer combined with DuPont Kevlar fibers, offering the feel of natural wood combined with the durability needed for a protective case. And it feels great in your hands!
Evutec also offers carbon-fiber-style cases and cases for non-Apple devices, but I think the beautiful Apple iPhones go great with the natural wood designs.