The latest update to the Pratimoksha (Via: Boing Boing) includes specific items about video games and email:
44. A bhikshu who has his private e-mail account with the result that he spends an inordinate amount of time in making unnecessary communications or communications which foster attachment commits an offence for which he must express regret.
46. A bhikshu who plays electronic games including those on the computer, commits an offence for which he must express regret.
It's a good thing my home is no monastery, or I'd have no time for anything but regret.