National GPS Usage Data: TeleNav

National GPS Usage Data Reveals Wal-Mart is Nation’s Most Searched for Destination While on the Road:

"TeleNav, one of the largest navigation services providers with more than 13 million subscribers, today released usage data* that suggests users depend on GPS navigation for much more than getting from point A to point B. The data indicates that while customers in various cities depend on some GPS features more than others, when it comes to searching out nearby businesses on the road"