Matt:
High resolution film scanning is often implemented with a line oriented CCD as opposed to a rectangular CCD. The line array (or the film) is moved at the necessary rate to achieve the necessary resolution in the direction at right angles to the CCD line. These systems also commonly connect to a PC or a MAC via a SCSI bus. The data rate is not only fast but the data volume is HUGE.

Your comment of wanting to do 36-bit color depth seems to also imply high pixel resolution. Seems to me that a 1Kx1K array just does not cut it. Of course it depends somewhat on the size of media that you are digitizing. If you had a 1000 pixel line type CCD and your media was 5 inches wide you would be only digitizing at 200 pixels per inch which does not seem to be too high of resolution to me.
Mike Karas