Solar Paint?

I know this isn't likely to be something in the DIY crowd for a while, but has anyone looked into photovoltaic paint? The Koenigsegg electric car concept supposedly uses this technology, and after doing some quick google searches, it seems that the technology is there, but unused.

Has anyone had any experience with this stuff? Is it a viable solution to sit-n-charge situations?

As far as I see it, solar power collected on a vehicle will never (or at least no time soon) be enough to charge a battery pack unless the car sits for weeks. But it could be enough to run some climate control systems in the car.