Portable Scanner Solutions for Research?

Fished asks: "Lately, I'm finding that I need to do a lot of research in Libraries -- remember those? I'm tired of feeding dimes to the copiers, and would like to buy some kind of portable scanner to go with my Powerbook. Unfortunately, I can't seem to find one that will work. Back in the eighties, this were as common as dirt: they were small, four inch wide scanners that you could run over the page. Also, while I've found three portable scanners for PC's (from Antec and Pentax) even if I could somehow get them to work with Mac OS X, they are sheet-fed, which is useless for scanning pages out of books. Does anyone still make the old-fashioned Hand Scanners, and do they make them for Macs?"