Hi Gavin,
I've now put two full frame scans on my web site if you want them. Beware though, they're big!
Scan 1 - Colour transparency (Fujichrome 100 ASA), 6400dpi, 48 bit, 26Mb! It's a direct 100% jpg - a TIFF would really have been too big, and examination at full size shows no obvious difference between first-generation jpg and TIFF. There is some unsharp mask apparent, but I don't know how to stop that - Epson Scan seems to apply it even if I tell it not to.
Scan 2 - B&W (Delta 400), 4800dpi, 48 bit, 8Mb. This one is also a 100% jpg, but it was produced using a Mac graphics utility that uses QuickTime jpg which has a better algorithm and produces smaller files for the same quality. Again, there's no obvious difference between this 1st generation jpg and a TIFF. There's no unsharp mask on this one - it doesn't seem to force it on me when I do b&w scans.