Yes, the kids are quiet. No, they're not on the street. But parents are finding that Buddy Lists and instant messaging have their own hazards.

Why some of New York's richest people are throwing off the tyranny of co-op boards and migrating to a new world of ultra-luxe, ultra-expensive condominium buildings.

The Upper East Side is where those on the way up -- bidding up real estate, wearing too much jewelry -- are in constant conflict with those on the way down. A new chapter in the age-old war between new money and shabby gentility.