According to Automotive News, Fisker flashed a picture of the concept on stage and said that it would use the same lithium-ion plug-in hybrid drivetrain as the Karma sedan. Fisker went on to say that the four-seater convertible would go on sale around the same time as the Karma sedan, sometime in late 2009. A spokesman said that it's expected to be unveiled sometime this fall.
Unfortunately, Fisker wouldn't provide us with an image of the 2+2 cabrio, but if you happen to have a subscription to Automotive News, you can see a shot of the two-door convertible with plenty of styling cues pulled from the Karma, including the flared fenders, elongated hood and patented Fisker haunches.
UPDATE: We decided to post the picture from Automotive News since it now can be seen on sites such as World Car Fans and eGMCarTech, though we've also spoken with Fisker and are trying to obtain an official image of the 2+2 convertible.
[Source: Fisker, Automotive News – Sub. Req.]