I know that GM had a concept that was slated for production but I thought the car was cancelled and I can't find any info online.

http://www.carenthusiast.com/2000/shows/geneva2000/vauxhall/articles/omega_1.html

http://www2.uol.com.br/bestcars/artigos/gen-11.htm

Then I ran across this info:

http://82.34.51.160/sytemsandsoftwaredevelopment/systems/automotive/Tech/omegab/

So did it see production or not?