Made with eco-friendly materials, Marware's new EcoRunner ($35, aka Eco Runner) armband and wristband case for the fourth-generation iPod nano is -- other than its dual bicep/wrist design -- fairly similar in design to past iPod nano armbands from the company. It uses a mix of green, gray, and black materials, plus a clear plastic face protector that lets the nano's color shine through. On protectiveness, it's pretty impressive, covering the entire…
