Version:           1.4.2 (using 3.5.8, Arch Linux)
Compiler:          Target: x86_64-unknown-linux-gnu
OS:                Linux (x86_64) release 2.6.24-ARCH

you go out, take thousands of pictures and then at home you have to sort them, to categorise them and put them in folders e.g. by ocasion or by person on the pic or by place, ...

often this cannot be separated by date - e.g. when you take pictures on a wedding, you want to make sub-folders later, one containing the guests, another children, the other the couple, ...

the fastest way is to make subfolders in a folder where the pictures are and then moving or copying the pictures from the top folder in the separate folders. 

gwenview is a powerfull, fast and flexible photo viewer. it would be great to have shortcuts association ability to the "External Tools". What i mean is that in gwenview one should be able to associate a keyboard shortcut (e.g. CTRL-a) to a external tool. this way the external tool could be "mv %F ./somefolder/%F" what makes such sorting very fast. 
also other external tools can be usefull to be run by a key and not by the menu option, its faster and in the full screen view it can be very useful to screen large amount of pictures (thousands) by just typing keys instead of on every picture doing a "rightclick -> External Tools -> the tool one wants"