sorry to say its not out in the states yet, I hear England already have them because they do not have emmission standards like we do.
So far I know only 2 car with Blitz supercharger, 1 is on Blitz car (I took photograph of this and its on this site gallery) the other is the APR Celica however I am not sure if it is running. I remember the Blitz celica supercharger winning quite loud, I did not hear the APR Celica SC sound at mbautosports meet not sure if it is working or not.