A honda Odyssey manual transmission can get 20mpg city/28 highway.
A Toyota Sienna Hybrid should be available in 2007 and should get about 40mpg
Toyota has been selling the hybrid Estima minivan in Japan since 2006 and it gets about 42mpg
Toyota Estima, only in Japan
The current best SUV for mileage is the Toyota Rav4 that gets 30mpg highway or the Ford Escape Hybrid that gets 36mpg highway