Building electric cars will come with its own set of challenges - but then, in other ways things are going to get a whole lot easier. With plenty of battery technology available pretty much off-the-shelf, and electric motors being incredibly simple compared with their combustion counterparts, there's not a lot stopping small, independent operators from building fun electrics and getting them to market as soon as they're approved for sale. And such is the case with the ECOS Harbinger - which truly could foretell a bit of a small-business revolution in electric sportscars. US$89,995 will buy you a 120mph, 150-mile per charge, 6 second electric supercar with Lambo-style looks and scissor doors to boot. Nice!