Marware has introduced its Sport Grip and Sportsuit Convertible cases for the iPhone 3G. The Sport Grip is made from non-slip silicone, and offers direct access to the iPhone’s screen, ports, and controls. The Marware Sport Grip for iPhone 3G will also include clear protective film and a microfiber cleaning cloth, and is now available for pre-order in a variety of colors for $20. The Sportsuit Convertible is described by the company as a 3-in-1 case that can function as an armband, a clip-on case, or a protective sleeve. made from lightweight, stretchable neoprene, the case offers an integrated clear vinyl display protector, an adjustable, removable Velcro armband, a removable armband carrying pouch, a Multidapt low-profile belt clip, access to the phone’s various controls and ports, and includes clear protective film and a microfiber cleaning cloth. The Marware Sportsuit Convertible for iPhone 3G is now available for pre-order, and sells for $35. Both cases are expected to begin shipping soon.