"Wired" has more details
The "Wired" article from which this article was taken answers some of my questions. The question of what it would sell for, that $3,000 figure, is only the cost of the parts of this prototype. Tildejac's estimate that it would probably sell for around 15K seems more accurate because you also have to take into account the cost of installation if you don't do it yourself...and we don't know if this would be that type of job for the average car owner.