In the next few weeks (and especially Cyber Monday), workers will no doubt be tempted to surf the Internet for killer discounts—but they need to remember, the boss may be watching.   More than half of workers (53%) say they spend at least some work time holiday shopping on the Internet, an increase of 3% from last year, according to CareerBuilder's annual Cyber Monday survey. Of this group that dare to shop on their boss’s nickel, 43% spend an hour or more doing so, compared to 42% percen...