[eno_]

The most promising of these technologies is the gas-electric hybrid vehicle, which uses both an internal combustion engine and an electric motor, switching seamlessly between the two to optimize gas mileage and engine efficiency.

Not really. "Light" hybrids are expensive and inefficient. Diesel-electric "heavy" hybrids that can plug in and charge up are probably where you get some real payoff from hybrid technology.

[WildTurkey]

Not really. "Light" hybrids are expensive and inefficient.

Tests show that light hybrids are cheaper to use in urban driving than straight gasoline cars.