From Ferrari Wiki
The Millechili (Italian language for: one thousand (mille) kilograms (chili)) is a lightweight two-seater car loaded with Formula One technology. In many ways it will be a successor to the Enzo, but instead of adding power, Ferrari will subract weight. The Millechili is a derivative of the F430’s aluminum space frame on a slightly longer, 104.3-inch wheelbase. The Mid-engine layout will carry a new V10 engine of unknown displacement making upwards of 600 horsepower.
Production is set to begin in 2010. An estimated 300 cars will be built over a couple years with a base price around $500,000 USD and the final name of the car is being decided.