In case you missed it, the new WS_FTP Pro 8 in addition to plain insceure FTP and SSL ftp now has FTP via SSH.
I used to use the sftp built into my ssh.com client.... it works great but it is not a full fledged/powerful ftp client. I am glad to see ipswitch make this available now.
For those not aware, using ftp via ssh does not require an ftp server but rather just ssh access.