I just try to balance it. Like CAMom my son is up and ready to go early so I let him play on the computer (he doesn't watch TV at all, plays the Wii maybe 30 minutes a week and his Leapster only occasionally in the car so computer is his only real screen time) until we're awake. I set up his profile so that he can only use the bookmarks that we have set up for him and most of them are at least partly educational. He does EPGY in the afternoons and I don't really count that as screen time since he's purely learning.
If I notice that he's been on the computer for what seems like a long time I make him stop for the night and go play outside or with his toys. I don't worry about it too much because even though it's not active play he's really learning when he's on there. I don't consider it wasted time.
Oh I guess I should mention that I'm a computer programmer and am on my computer way more than most people so I really am probably more lenient on his computer time than most.
