Bob,

> After porting (most of) your TIFF plugin to Win32 early this year,
> I concluded that LIBTIFF was happy to write JPEG-compressed
> TIFFs, but some major hacking would be required to get it to write
> JPEG files.

That sounds strange ... if I'm not mistaken then LIBTIFF uses LIBJPEG
directly and thus all you'd need to do is to expose the interface of LIBJPEG
to Squeak.

Cheers,
  - Andreas