If you use Zeid Derhally’s NetPenguin for your FTP needs, you can install a small penguin replicant in your Deskbar that will give you one-click access to your bookmarked FTP sites. Just add this line to your UserBootscript:
/boot/apps/net/NetPenguin/NetPenguin -deskbar
(substituting the actual path to your copy of NetPenguin, of course). From then on you’ll be able to click the little penguin in the Deskbar and select an FTP host to jump straight to a site.