I take many photos. The filenames are minimally useful, determined by the cameras, just a sequence. I organize them into folders by date + subject, like:
"20120628 concert in the park"
I would like to have Windows 7 index *only* the folder names, not the file names, so that I can quickly find photos by subject. So far I haven't seen any hint that this can be done. It would save a lot of space in the index, and a lot of time in the searching later...