sftp comes with ssh2. Use the dummy shell to lock out users or just set their shell to /bin/false. Also check out chrootgroups, since sftp doesn't chroot by default.
I'd give you a link, but every time I post it, the moderator rejects my message. > Please help me pointing me to a right solution: is ftp the > way to go?, could it be ssh? (but I don't want to give users > a shell, only need they be able to access some files from my > computer and viceversa).