I've just seen a post on another thread:
Apart from the firewall module Plesk is working on to place in 7.5? I'd rather plesk could simply integrate APF and provide a web interface to the apf.conf file. Much easier than writing your own guys, and APF is stable, mature and reliable. You could stick BFD in as well.
Yes, the suggestion: allow a user to untar (or unzip) a file from the file manager. Currently, if you don't have SSH access, you must untar an archive and ftp the whole lot, file by file which takes ages. An untar option in the web file manager would provide a useful function for clients who aren;t allowed SSH access.