Belkin's Ease-Fit Armband ($20) is the first armband we've seen for the iPhone 5, and while it doesn't deviate too much from past designs, it looks like it'll get the job done. The lightweight neoprene holder has a dedicated pocket for the taller iPhone with a clear touch-through window covering the display. It covers almost all of the device's body, leaving only openings for the headphone port on the bottom and a slit across the top for inserting…