This is actually a concept car originally developed in 2002 with planned limited production in 2010. With everything on the car made out of lightweight carbon-fiber or magnesium, there's just no way this is getting sold for $600 each.
VW 1 Liter Car
"1-Liter Car Speculative Pricing
Rumors put the price at anywhere between "20,000 to 30,000 Euros (about $31,750 to $47,622)". But if oil prices keep climbing, that might be a bargain in 2010."
from this site.
The Tata Nano, on the other hand has promise for at least the folks in India.
$2,050 - 55.5 mpg
Is New Tata Nano the World’s Most Fuel Efficient Petrol Car?