With gas still hovering at $4/gallon, I can't help but remember fondly my wife's 1985 Honda Civic hatchback - 55 mpg on the highway! Even when we lost compression in one cylinder at 120,000 miles, it still got over 40 mpg. Love to have that baby back.
If I went looking now for fuel economy + sportiness, I'd get a Honda CRX. The 5-speeds were fast & fun, and they got 45 mpg on the highway.
At the moment, I'm sticking with my B, and my Ford Escape. Both get around 21 mpg. The Escape has been paid off for years, and is in excellent condition. I'm going to drive it as long as it lasts. It's an '01 with 115,000 miles. I'm hoping to go 200k at least.