Ford Launches First American Hybrid
Ford has finally rolled out their Escape hybrid SUV. Ford's website has more information. Ford will use Toyota's first-generation hybrid technology in the SUV (the 2004 Prius is Toyota's second generation technology). Best of all, the Escape is street-legal in residential areas. Update: 08/06 22:31 GMT by M : A reader points out that GM will be selling a hybrid pickup soon, but it isn't available for sale to the public yet, so Ford is still the first.
Hybrids are very efficient in heavy stop and go traffic, but not much better than a regular car on long freeway trips. A diesel would be better for that. The VW TDI gets over 40MPG freeway. The extra power from the electric motor is good for accelerating from stop lights, but if you're climbing a long highway mountain pass, the battery never has a chance to recharge and you're left with just the power from a somewhat undersized gas engine.
You couldn't just wire up a regular starter motor to a bigger battery. They're made to be very powerful for their size, but they'll overheat and wear out if run for long periods.