Not sure if this is quite what you're looking for, but hopefully it helps. Here's a nice little KDE app called KRename
that, according to the website, "offers an easy way to rename hundreds of files in one go, giving you as much freedom as you need. You can use parts of the old filename, information like the current date or even an mp3 tag or the colour depth of an image."
It'll also integrate into Konqueror or the Krusader file manager. I've used it just a little bit, but it's a pretty useful little tool