This sounds a bit like something I have pondered about - except I would really like to see a more generic image selection import/export feature, to allow use with various webgallery solutions. I have been testing ImageFolio 4 Pro for awhile, and it's e-mail lightboxes feature generates a text-list of all the selected images in the online lightbox, and sends it in an e-mail. The output looks like this:
This lightbox contains the following files:
API/Portretter_27.03.2007/Skissebilder_sorthvitt/API-20070327-6062.jpg
API/Portretter_27.03.2007/Skissebilder_sorthvitt/API-20070327-5906.jpg
API/Portretter_27.03.2007/Skissebilder_sorthvitt/API-20070327-5830.jpg
It can be really tedious and time-consuming to re-locate those very same images locally on my Mac, if the list is long enough (and it frequently is). If there was a way to just import that list into PM and have it perform a "multiple" search for those images, that would make my workflow a lot easier. It would be great to have user settings for this tool was so it could accept paragraphs, commas, slashes or whatever separator sign that the users web gallery uses.
Sometimes I have missed a similar list view in PM - when I have to manually re-locate images by filename - so I guess that a filename list view in PM becomes another feature request