The kids are basically at zero TV per week these days. Every so often, we do a movie. They are allowed an hour or two of computer time a week--sometimes more if need be. DS was watching 3-5 hours per week from age 2 to this year, but now he's in preschool daily and I don't need him to anymore. (It was so I could work.)
I regard screen time as a babysitter that can be useful and fun in small doses. I don't think it's really educational, and research generally backs me up, although there's a lot we don't know about computer screen time (vs. TV). There is a lot of data showing that in excess, screentime displaces other activities that are far more valuable to children. The average amount of DAILY screen time for children 7 and over is something like 9 hours.
