The Librarian in Black pointed the way to a fabulous tutorial on digital preservation. Anyone interested in the subject should take a look at Digital Preservation Management: Implementing Short-term Strategies for Long-term Problems.

Here are some other interesting works on digitization:

Selecting Research Collections for Digitization by Dan Hazen, Jeffrey Horrell, Jan Merrill-Oldham.
Washington State Library Digital Best Practices site
Digitization Resources from the Colorado Digitization Program
The State of Digital Preservation: An International Perspective (Conference Proceeedings)
Building a National Strategy for Preservation: Issues in Digital Media Archiving