Ferrari just released photos and specs on the 488 Spider and here it is in all of its glory. The 660-hp convertible features a similar folding hard-top as the Ferrari 458 Spider but is 55 lbs. lighter than a comparable cloth roof and can fold up or down in 14 seconds. When the roof is folded down it lies flat on top of the engine.
Ferrari may have removed the roof, but the 488 Spider is claimed to have the same torsional rigidity as the 488 GTB. It utilizes a spaceframe chassis made of 11 different aluminum alloys in conjunction with other metals.
See the car here: