I have a Fiji Xerox Docucentre II C4300 and here’s how I set it up to scan via FTP to OSX Lion.
1. Enable the built-in FTP server. To do this I downloaded “Lion Tweaks” from here and pressed the ‘Enable the hidden FTP-Server’ button.
2. Make a Folder called ‘Scans’ in my home user folder.
3. Go to Xerox printer ‘Scan to PC’ setting and there are 4 settings you need to fill in:
Server: Enter the IP address of your Macintosh Computer. (Go to System Preferences, Network to find your IP Address, e.g. 10.0.0.121)
Save In: Scans
Username: Your OSX Username
Password: Your OSX password.
Then when you press Scan the pdf of the scanned document will appear in your ~/Scans folder!