Toyota was using an electric power assist on the MR2 in the early 90's. Theirs was still a hydraulic system though. I don't think I would be interested in this fly by wire system even if I could afford it.
There's really nothing remote about it. The mechanical connection goes straight through it, and the power assist is just electric. F1 cars have used for a while now because of the small size. I want to try one on a project this winter....if I can find a way to scrape up the cabbage for it. It will be under the dash, so new pedal brackets have to be made. In a mopar at least, I see no way to mount it under the hood - although small, the steering shaft area is already cramped, so there's no where to put it and still have exhaust...
Everyone must have seen this in MCG at the same time; there is a thread about it on almost every board... ;D It's very cool, but that price is hardcore; I'd like to see a car with it installed up close, though.
The new Vw's have electric assisted steering. The electric motor is built into the steering rack. Very compact unit, however trying to adapt the control unit to an older car would be quite the project.