I just got back a roll of film I had sent in for processing. I took it to
a Kodak agent yesterday, and selected the "PictureCD" option (for $10 extra).
Consequently, with my prints, I got back a CD-R containing scans
(at a generous 1536x1024) of the photographs. The CD packaging lists
Windows or MacOS as requirements for viewing it, though my Linux machine
sees it as an ISO-9660 image containing .jpg files, which is good enough.
The Kodak PictureCD service gets a thumbs-up from me; having a CD-ROM of
JPEGs is a lot more convenient than an envelope of bits of paper.