Yes SFTP is something that is planned but since it is a totally different protocol then FTP it is not something that is added easy.
first thanks for nice piece of software.
+ for SFTP, consider advantages SFTP over FTPS:
(1) FTP is older than SFTP
(2) SFTP is available (because of OpenSSH) on most UNIX systems and it isn't necessary install/configure/maintain other FTP software.
for me is SFTP vital feature and would be cool handle it with multicommander.
You can not compare SFTP and FTPS they are completely different protocol..
FTPS is FTP over a TLS/SSL conncetion. (Like https , same protocol as http but over a SSL connection.)
SFTP is a totally different protocol then FTP. and has nothing really to do with normal FTP