For me, as a high volume photographer, FileFinder is almost as important as photoshop to me. I have a bit over 13TB of raw data in my Offline Image Archive and I do not want to use any of all the image database-applications out there (Cumulus/PhotoStation/ExtensisPortfolio/Aperture/Lightroom/and so on) because of the databas-dependent environment these apps rely on. Classical DAM-apps are great in many ways, but not for my archive needs. And this is where FileFinder does the trick for me with the export previews with mirrored path-structures.
I have micro copies of all my off line hard drives locally, and I can fit ALL my images on a USB-memory in my pocket if I need. These "thumbnails" are the ones that I use in the classical DAM-applications mentioned above. The actual high resolution master file is easily located by following the mirrored path wich starts with the disk name.
So - I have access to over 13TB of image data in a snap. And I dont need a xserve, no thousands of dollars in hard drives (just simple external off line ones).
I wish my english was in pair with my entusiasm over this feature, then I could explain my method well and the world out there would stop investing in stupid master-files-always-on-line-24/7-in-a-mega-expensive-disk-solution. FileFinder does the trick.
(yes, PhotoStation uses quite the same method with real thumbnail file objects, but you still MUST use PhotoStation to understand anything.)