I tried out the Honda Hybrid last year. Quite apart from it being the least comfortable car I've sat in for ages, the quoted fuel consumption was 58mpg overall. Given that I get 45 - 47 mpg out of my very comfortable Scenic, I couldn't see much point in switching.
On the other hand, if this is the future, I might be persuaded...
ZAP World - 1/30/2007 - The ZAP-X Crossover Electric Car - 155mph, 644 Horsepower, Based on the APX Technical Demonstrator Vehicle Designed & Developed by Lotus Engineering