www.edmunds.com In the United States, boxy compacts are still a left-of-center novelty. People buy the Scion xB and Honda Element for their space-efficiency, versatility and neo-Bauhaus design. And they certainly don't mind the kind of gas mileage that's made possible by thrifty four-cylinder engines. While sales of such cars are modest (about 60000 Scion xBs were sold in 2006, for example), the xB in particular is a draw for young buyers, who are worth their weight in iPods.