The OWC USB 2.0 Display Adapter from Other World Computing allows you to add an extra display to Intel Macs or Windows PCs using any standard USB 2.0 port. The adapter connects to HDMI, DVI, and VGA equipped displays (including projectors) in 32-bit color at resolutions up to 1600x1200 or 1680x1050 digital. Included driver software means that the display can be used in mirror mode or as an extension of the desktop. Up to four adapters can be attached to a single computer.
(Source: Macintouch) | Cost: US$99 | Requires: Mac OS X 10.4+ or Windows 2000 & up | For further info...

Prizmo 1.0 from Creaceed is an answer to the idle musing of no doubt many a user – an app that allows you to use your digital camera as a "scanner" for both 2D and 3D objects, including receipts, book and magazine pages, signs and posters, landscapes, and more. Its bundled software allows you to correct the resulting image for contrast, sharpening, and – impressively – for perspective, too. The resulting images can be printed, emailed, or saved to disk. Includes support for JPEG, RAW, and TIFF input images, and more. Any digital camera will do, but it for best results it recommend a 10-megapixel camera or higher. For potentially saving you the cost of a scanner such as the ScanSnap or the newly released NeatDesk for Mac, however, there is a price.
(Source: Macintouch) | Cost: USD $39.95 | Requires: MacOS X 10.5+, digital camera | For further info...