ZAP has taken millions from investors and dealers eager to see the company's line of green cars hit the road. But that line has never materialized. Of nearly a dozen groundbreaking eco-vehicles ZAP has promised in public announcements and on its Web site, only the Xebra and its sibling, a truck version, have ever made it to market. As a result, fans of electric cars have grown disillusioned, while individuals like Youssef have been financially devastated. What's more, investment firms around the country have become cautious about financing electric vehicles after being repeatedly misled by one of the industry's most visible companies.