Company's new wireless tech will watch house when you can't

Tom Henderson - Two former presidents of OnStar Corp. have formed another company that uses wireless technology to communicate with customers. The company is Northville-based HouseSetter LLC, and it offers what it is billing as a check-in service for people with second homes. Using sensors and a camera embedded in a 7-inch replica of a dog that is placed in the second house, owners can remotely get reports on humidity and temperature, make sure the electricity is on and get images of the interior. Retirees