I handled that gun at SHOT. I believe the price was going to be $600-$700. I can't tell you what the width was, but it was really really slim.
I spoke with Mr. Rohrbaugh for quite a while, you could tell that he was super proud of his invention. For example, he showed me the trigger mechanism, he said that he wanted something better than your standard small gun, but still 100% reliable ignition. So he built 7 different trigger assemblies, and kept the one that worked the best.
Dr. Beretta stopped by the booth, and after fondling the prototype for a while told the owner that it was the best new gun he had seen at the show.
I've still got the literature from the show, if somebody is interested I could probably find their phone number/e-mail address. PM me if you want it.