Jivo Technology has announced its new Leaf case for the iPhone 3G and iPhone 3GS. Unlike most plastic iPhone cases, the Leaf is biodegradable in five years once it comes into contact with microbial environments typically found in landfills, thanks to a specially formulated resin that is injected into the case during manufacturing. Other features include open access to all ports, a matte finish, a leaf design cast into the rear of the case, and completely…