Bracketron has unveiled its new MetalDock Charging Dock for the iPhone 4 and iPhone 4S. Crafted from solid metal, the MetalDock is a thin, curved dock that wraps around the bottom left corner of the iPhone, allowing the stand to work in either portrait or landscape orientation. Other features include an integrated 3-foot cable, fast charging support, and rubberized feet to hold the dock in place. Bracketron’s MetalDock will be available in June…