Certainly, it takes a scanner longer to scan at 600 dpi than 300 dpi, so for major book scanning projects, scanning speed is a factor to consider. However, I would think that many projects submitted to DP are done by individuals who are only doing one to a few books in a year, not hundreds of them a week. So for them, choosing the slower approach may be acceptable to them, especially if they cherish the book and wish to assure the scans they make are of the highest reasonable quality for archival/preservation purposes. (To the DP folk: what is the breakdown of book scans submitted to DP by users -- do just a few supply most of the scans, or are most of the scans submitted by a lot of people?) In my experience scanning both My Antonia and the Kama Sutra, I took advantage of the slower speed of scanning (and I have a slow scanner to begin with) to do filenaming and other tasks that needed to be done anyway. After all, each scan needed to be looked at to determine scan quality and to read off the publisher supplied page number, so that info could be written into the filename when the image was saved. So in total time *to me*, it differed little whether it was 300 dpi or 600 dpi. I simply multitasked. In fact, at 300 dpi, where I could not multitask, it may have taken me longer to finish the job. YMMV... Speed also depends upon the speed and quality of the scanner one uses. My scanner is a Microtek Scanmaker X6EL. A pretty inexpensive but reasonable quality flat bed scanner with 600 dpi optical resolution. Not exactly a speed demon. (Most flatbeds today are 1200 dpi optical, which is pretty much the practical limit for such scanners due to mechanism vibration and other factors, so the experts have told me.) My plea is that those who are doing scans for DP seriously consider 600 dpi full color, especially if they've chopped the book or are using a scanner designed for book scanning, such as the Plustek Optibook, where there's no page and lighting distortion due to bending pages (it's sort of silly to scan at 600 dpi when there's subtantial page distortion due to scanning a bound book on an ordinary flatbed.) Then convert those master scans to DP requirements, and archive the master originals. So, all I'm simply doing is suggesting DP's scan contributors to consider higher-rez/full color -- a few may choose to take this route as they assess it for themselves. Jon