Reuters: When Tom Weatherbee swapped his minivan for a Toyota Prius hybrid two years ago, he was mostly hoping to save money at the gas pump. But he was pleasantly surprised by both the requests from friends for a test drive and the grins its aerodynamic profile drew at the grocery store, and he basked in the attention. "Even the people who own more expensive cars acknowledge the Prius as being pretty cool," said Weatherbee, 51, an electrical engineer who lives outside …