Yes. It is driving me mad.
DS1 (15) is on MSN all the time and has to be strongly coerced off it. He bitterly resents it, just as I bitterly resent the fact that he would rather talk to his mates than be with his family. He does, though, play the guitar and has just started lessons (and formed his own band)
DS2 is on the Wii all the time. If not on the Wii he sneaks on to my laptop and plays computer games on there.
At least during the summer DS1 plays cricket, but DS2 has no other interests and just doesn't get why I think it's so important. The only thing he really wants to do is to learn to play the drums - and I have finally given in and arranged lessons for him. (Biggest concern is not having the room for a drumkit at home for him to practice on).
I'm currently waging a campaign to reduce time spent on various computers, and to re-introduce reading - but I do feel like I'm pushing an awful lot of water up a very steep hill.