Summary: The Fujitsu ScanSnap S300 is one of those devices you might not think you need, but after getting one you'll wonder how you ever survived without it. Touted as the world's smallest duplex ADF (Automatic Document Feeder) scanner, the ScanSnap can help you organize your files, whether at the office or on the road. It quickly digitizes documents into searchable PDFs, has a small footprint, and can be powered off of USB.
Pros: "One touch" instant PDF or JPEG file creation, Fast duplex scanning, Easy to carry in a briefcase or laptop bag, Automatic image correction, Excellent build quality
Cons: Need to install software before use (not just plug-and-play), Not Twain/WIA compliant; you can only scan using the ScanSnap software, Powering via laptop USB requires two USB ports, Full version of Adobe Acrobat not included, as with the larger (more expensive) models, Carrying case costs extra
Summary: For small scan jobs and occasional scanners, the ScanSnap 300 portable document scanner comes highly recommended. It's amazingly small and compact (you could fit it into your top desk drawer) and since it can run via two included USB cables, it's not going to add another power cord to your already overworked electrical socket (of course, an AC adapter is included as well).
Pros: Very compact, Can run via USB or AC adaptor, Scans duplex during one pass
Cons: Small paper guides sometimes allow paper to angle