Became aware of this through a pathology listserv as a low cost digital camera (under $100).
"The zPix™ 200 from Carson Optical is a powerful Zoom Digital Microscope that displays the Magnified image right on your computer screen. The impressive 26x-130x Zoom Magnification allows you to see details of ordinary objects you never knew existed! Capture an image to keep using the built-in 1.3 megapixel resolution Digital Camera. You can even capture close-focus video! The MM-740 Zoom Digital Microscope is compatible with the following: Mac OSX 10.4 or later, Windows 98 SE, Windows 2000, Windows ME, Windows XP, Windows Vista. A USB 2.0 port is required.
Also available with a 640 x 480 resolution Digital Camera- zPix™
View some images we took with the zPix"