How many employees surf non-work-related Web sites while on the clock? In a recent survey, 90.3% of workers reported such surfing. And 31% of employers said they're monitoring or restricting employees' workplace Internet use. Sending and receiving personal e-mail at work is also becoming a hotter workplace issue. This week The New York Times fired 20 employees for e-mail related infractions. The Vault.com Survey of Internet Use in the Workplace reports that 83.6% of employees send personal e-mails during the workday. The survey of 1,244 employees and 1,438 employers also found: