@Walter Hinteler,
Just to correct some more faults in gunga's link:
- the car originally was devopped in 2001/2, then stopped, then re-developed
- first time the car presented in September 2007,
- built (not in Hamburg but) in VW's experimental factory close to test track facility in Ehra-Lessien (Lower Saxony)
- the price of 35,000 Euros (if/when production starts in 2010*) is thought possible to be reduced to 5,000 Euros from 2012 onwards.
* There's no other serious news known then what was published in 2007.