Bowker has reported a "staggering rise" in the number of print-on-demand titles:
"The most startling development last year is the reporting of 'On Demand' [p.o.d.] titles, leading to a stunning five-fold increase of new titles in the unclassified category, which mostly consists of reprints of public domain titles and other short-run books," said Kelly Gallagher, general manager of business intelligence for Bowker. "It will be interesting to monitor this category in 2008 in order to get a sense of whether this is a sustainable trend or a one-year spike."
Glad to have contributed my bit to the PoD surge!