Sold in two versions that unusually differ in their top and bottom designs, XGear's new N2O Nitrous Oxide Cases for iPhone 3G ($50) use the same faux carbon fiber leather found in Case-Mate's products, wrapped around a plastic hardshell that provides coverage for most of the iPhone 3G's body. Each comes with a clear screen protector and microfiber cleaning cloth. The black version has an open bottom for easier docking, while the red and black version…
