Christmas was profitable for Amazon.com this year, and shares, according to Reuters, rose nearly 9% after the online retailer said it had recorded its best holiday season ever. Spokesman Craig Berman said Monday sales for its 10th holiday season were better than any previous year, but he declined to give specific figures. Seattle-based Amazon also said it had set a single-day record in which 2.8 million units - or 32 items per second - were ordered. But Berman declined to say what day during the holiday season that was, or whether that also translated into a record day of sales.