Penpower WorldCard Office Business Card Scanner for $39.99 shipped after a $20 rebate.  The rebate is valid until 6/4.  Here is a screenshot for your reference.  This portable scanner is roughly the size of a mobile phone.  It features 600 dpi greyscale scanning, 4-second scan speed per business card, support for import/export/sync with several programs including Outlook.  It usually sells for about $90.