Not sure who on this board will be using FTP software, but I have to recommend:
http://www.bitvise.com/tunnelier.html
I was using Core FTP before, but just switched to this one and love it. Heard about it from Mikey's stuff (http://forums.voiceofthepublic.com/mikey/index.php).
Ah interesting stuff....
I have been currently using SmartFTP, and have been using it for a while now. I shall check out Tunnelier :)