if my memory serves correctly maseratis made a name for themselves in the bi-turbo world. i've seen cars with supercharged superchargers... and most definately twin charging is possible...
twin superchargers
http://www.youtube.com/watch?v=kiWUN...eature=related
twin charged
http://www.youtube.com/watch?v=brZ0B...eature=related
http://www.turbomagazine.com/feature...ged/index.html
here's this car
http://www.youtube.com/watch?v=rd4XA8czlks
