Update to http://archiv.twoday.net/stories/2484031
http://cnx.org/content/m13940/latest
Excerpts:
A monograph with 100 illustrations might well cost its author $5,000.00 or more in permissions costs after the images are purchased. For books on modern and contemporary art, that number is likely to be considerably higher. […]
Scholars and editors also express grave concerns about the time and effort required to secure good images and permissions to reproduce them.
See also
http://cnx.org/content/m13952/latest