There's an article at the Sam's Publishing web site that gives a brief overview of the Common UNIX Printing System which was included recently by Apple in Mac OS X. Perhaps this will be of use to others.
http://www.sams.com/catalog/article...ion_id={B4BBCC89-0B16-44E3-A08A-0B435CB4EC70}
http://www.sams.com/catalog/article...ion_id={B4BBCC89-0B16-44E3-A08A-0B435CB4EC70}