ScanSnap S300 and S1300 are great scanners

Fujitsu ScanSnap S1300 Instant PDF Sheet-Fed Mobile Scanner (PA03603-B005)
ScanSnap S1300
The Fujitsu ScanSnap S300M  is the smallest duplex ADF scanner you can buy (buy here) is the world’s smallest duplex ADF scanner, optimized for the Apple Macintosh system. The mini Fujitsu Scan Sansnap lets you Scan to PDF Instantly on Macs
The ScanSnap S300M also easily converts scanned data into PDF files.

More outstanding features of this very small Portable Scanner.
You can get yourself very organized and you will no longer have to Try Neat to keep a Neat Desk in your office.  You can digitize just about anything with your ScanSnap S300M.  You can double your scanning speed with the duplex scanning that scans both sides of the page in one pass. The portable scanner comes with image correction as well so you no longer have to worry about unreadable scans. 

If you have a Mac then this the scanner for you.  The Scansnap S300M is at the top of the list when it comes to scanning solutions for Apple. 

Also check out the FliP-Pal Portable scanner that is for people who love to create photo scrap books.  The Flip-Pal is becoming legendary because of its extremely innovative design. 
Flip-Pal mobile scanner
The FliP-Pal By Couragent! Buy One Here $ 149