My wife and I were about to put our house on the market before Hurricane Katrina. I remind myself of this as we contemplate an act that has taken on the trappings of civic treachery--putting our house on the market now, a year after Katrina. It's true: We really were talking to realtors last summer. It was time to downsize, we said. Empty-nest syndrome, we said. That was our cover. Secretly, we were a bit freaked out about hurricanes even before Katrina. (At least I was.) Not so secretly, we were certain the national real estate bubble had reached its soapy and iridescent limit.