Official Word:

Toyota, the worldwide leader in hybrid sales and technology, is publicly debuting two uniquely modified Prius gas-electric hybrids at the 2009 SEMA Show. The Prius Aerius (Latin for "belonging to the air") is a show car that integrates performance and design modifications with environmental elements, which embody the principals of sustainability. The Prius Aemulus (meaning "envious imitation") is a drivable close replica of the Prius Aerius that has been donated to the Environmental Media Association (EMA)...Read.