Last week's trip to iRobot's headquarters in Bedford, Massachusetts wasn't just about tossing battlefield 'bots about. We also had the opportunity to check out some of the company's more domestic offerings. The Scooba 390 is the latest addition to the iRobot's line of floor cleaners. The mopping 'bot offers a couple of enhancements to its older sibling -- rather than considering it a full refresh, the company's referring to it as an "update to respond to customer feedback." The biggest difference here is improved battery life -- a welcome change in any device. According to iRobot, the 3
