Miniot has introduced its iWood 3G wooden case for the iPhone 3G. The iWood 3G is made from a single piece of selected wood, and covers the phone’s back and sides, leaving the front face open, and offering access to the phone’s camera and other ports and controls. Miniot is also offering a service which allows customers to have their own logo or message engraved on the back. iWood for iPhone will begin shipping by the end of July and sells…