It would be great if there were a Toggle Case tool in “edit citation” in CWYW/Word. Word 2007 has this function in the “font” group on the main ribbon–you can just highlight text and choose the case you want.
I usually cite from sources that follow BOTH US (all major words capped) and European (ie initial capital only) in the same paper. And they’re entered every which way in my library, so I have to hand-edite them all. A select case tool would be GREAT.