Sources say Amazon (AMZN) has bought Touchco, a start-up specializing in touchscreen technology....

|By:, SA News Editor

Sources say Amazon (AMZN) has bought Touchco, a start-up specializing in touchscreen technology. It's a sign that Amazon wants to upgrade its Kindle to compete with the Apple (AAPL) iPad. But some analysts believe Amazon is fighting a battle it can't win.