Just an idea I had and thought I might share.
Basically I do allot of repetitive FTP transfers with the window split in half, and I like Konq over other apps.
I taught a toolbar allowing the easy copy of selected files either side and the ability to sync and see the difference between the sides aswell would be cool. External apps do all these things but Konq integration is the key to productivity I think.
A picture says 1000 words.