As the less expensive, easier to install and less protective version of OtterBox's Defender Series Case, the new Commuter Series Case ($35) combines two layers of case protection with a clear screen film layer to protect most of the iPhone 4 against damage. Though the ringer switch, speakers, and microphones are exposed at all times, Commuter has flip-open headphone and Dock Connector port covers, integrated top and side button covers, and a combination…
