CNet has this story, highlighting the two way processes of digitization and materlialization
On Demand Books, makers of the Espresso Book Machine, are expected to announce Thursday that they have been granted access to Google's library of public domain digital books for use with their product. The Espresso Book Machine can print a 300-page book in four minutes, complete with a cover and a bound edge. It ranges in price from $75,000 to $97,000, depending on the configuration, and is found mostly at universities, libraries, and institutions around the globe.
The books thus produced are probably so cheap that it's more economical for libraries to simply give them away that to loan, track, process the return, and re-shelve them (which costs quite a bit, I think Brewster Kahle, archive.org, once put a figure of $4 on it, though obviously that depends on a lot of variables.) See also this article with details on pricing (sales price at about $8 per book).