The Public Domain Archive and Reprints Service is something that I have thought would make an interesting business model: take public domain materials and publish them using a print-on-demand service.
With the various scanning projects, there are more and more public domain works available electronically each day, and the benefits are many. Whether out-of-print, rare, fragile or some combination of all three, many books won’t work in a circulating collection. This can put many books back into library circulation.
This could also be a potential model for rare book and archival collections : scan everything and make the newly published version available for your public users — without risking the originals.
from LISNews