Where is your Laptop?

Today's Chicago Tribune has a article which has to make one pause:

"More than 12,000 laptops are lost each week at U.S. airports, according to a study conducted for Dell by the Ponemon Institute, a research think tank. Only one-third of laptops lost and found in airports are reclaimed, the study said."

I guess that means that two thirds of the laptops are never missed by the persons that lost them? I wonder how much personal or customer information is on those?