Uniea has announced its new U-Diamond case for the iPhone 3G and iPhone 3GS. The U-Diamond case is made of a double-silicone construction with a diamond matrix design style and texture and provides cutouts for the iPhone camera, Dock Connector, speakerphone and ringer switch as well as pass-through buttons for the iPhone volume control, and includes a U-Shield screen protector. The case is expected to be available in five different colors and is scheduled…