Pay-as-you-drive insurance: MyRate drive monitoring device goes national

With Progressive Insurance:

The little blue box plugs into your car's ODB II diagnostic port (all cars made after 1996 have one), and studiously records your driving habits, wirelessly sending the data back to Progressive HQ (it's not clear exactly how). Every six months, Progressive will crunch the numbers and issue a new rate for you based on how you drive -- savings of up to 40 percent are possible.