New renaming tool for digiKam

In the past renaming images in digiKam was not very powerful. Most users (me too) renamed their images with KRename, a quite powerful batch renamer. But calling KRename from the "Open With..." dialog in digiKam was not very intuitive, it just felt wrong. digiKam can manage nearly every piece of information found in an image, therefore it would be nice to have all this information available for file renaming, too, since renaming is one of the basic managing tasks.
This is a companion discussion topic for the original entry at https://digikam.org/news/2009-09-19_new_renaming_tool_for_digikam/