Here some snippets from their former web page www.siliconfilm.com
(via the way back machine):
"PRODUCT AVAILABLILITY SUMMER 2000
"Going Digital is a Snap"™
*First shipments of EFS-1 are designed specifically for the following camera bodies: Canon EOS 1N, Canon EOS A2/5; Nikon F-5, Nikon N-90/F90, Nikon F-3. Additional model compatibility will be posted on this website as EFS Products become available."
"Here are some examples of higher-end digital cameras currently on the market, and how they compare to EFS-1:
Camera Model "Street" Price Focal Length Multiplier
Kodak DCS 560 $27,000.00 1.3
Kodak DCS 620 $10,000.00 1.6
Nikon D1 $5,500.00 1.5
Kodak DCS 315 $4,949.00 2.6
Silicon Film EFS-1 Below $800.00 2.85*
* Future Silicon Film products will have lower focal multipliers to meet the needs of photographers."
Later they tried to go full frame (on paper/PDF) but nevere managed to bring up some product.
I dreamed about a full frame silicon film with my F1 new - a dream camera in terms of operability etc.
I always hated to change cameras and to learn new control layouts. A exchangeable sensor-processor-unit would be great - sensor alone doesn't make sense because it needs co-evolved cpu's.
I am dreaming of a 18(10) mpix B/W module for my 600D(40D) which would provide 3 times the sensitivity due to the lack of the light absorbing RGB filter array and omit the necessity to do bayer demosaicing.