Have a remote FTP server directory mounted locally is pretty convenient for cross-server copying.
It could also come in handy if you would like to copy content from your NAS to say, and RGH/JTAG Xbox360 using the built-in FTP server of Phoenix or FSD FreeStyle Dashboard.
1. Install curlftpfs
apt-get install curlftpfs
2. Create a local directory
3. Mount the FTP server using a hostname or IP address
curlftpfs ftpuser:ftppass@ftphostname /media/ftp/