I believe that s/he is seeking an interface, much like a standalone print-server, a little box with a USB connection for the scanner and an RJ45 for the network which will take the image, put it into a reasonable format, and sent the file someplace (SMB or FTP, or whatever). This replaces the PC (or the $500 old laptop) and allows you to have a networked scanner for $200.
Devices like the HP DIgital Sender are very nice, but too expensive for what this person wants.
This would be a cool thing to have. I have seen more expensive versions, often with built-in storage, but nothing in the $100 range.