At last, RokForm added more color to their Rokbed aluminum iPhone 4 cases with up to 10 different color selection including a matte black finish and a new AZ31 magnesium Rokbed, the world's first and only full magnesium iPhone 4 case. Until now, Rokbeds were available in a glossy black finish only with different colored bottom parts. This is a very welcomed addition since I reviewed the Rokbed not long ago. The Rokbed aluminum iPhone 4 case will run you $79 while the Rokbed Magnesium will set you back $149.