While they may be less common today than in the past, there's clearly still a market for Bluetooth earpieces. Just about a month after Jawbone's newest Era was released, Plantronics has come out with its Voyager Edge ($129). The two units share many of the same features, but have different designs. Unlike Era's short, squat body, Voyager Edge is long and narrow. You'll find a power slider, volume buttons, and a command button, along with three microphones…
