The fuel cell article in the March 15 Fortnightly twice mentions a target of $50 per kilowatt for fuel cells. (See "Fuel Cells: White Knight for Natural Gas?" p. 22.)
I hadn't heard that target before. At that price, something like the General Electric/Plug Power residential unit of 7 kilowatts would cost $350 (instead of something like $3,500, which has been talked about). Anything close to $50 per kilowatt would be truly incredible.