SwitchEasy's series of Nude cases has come to the latest iPhone: Nude for iPhone 4 ($20) is an aggressively priced glossy hard plastic shell sold in eight different colors, each with the company's typically impressive collection of pack-ins. Nude ships with twin Dock Connector port covers, two headphone port covers, and even two clear film screen protectors, plus a cleaning cloth and applicator card. Though the case doesn't include button protection…