Just throwing out an idea for debate and comment....
Arturo and Mcroskell have both expressed an interest in processing PDFs that are sprinkled with trademarked logos of various outfits like CDSM, Everynote, etc. I've had to delete a number of such items recently due to the presence of such logos in the file.
If an FTP area could be set up so that registered users like Mcroskell and Arturo could download such files to clean them of all offending trademarks, etc., we could expand the collection that much more rapidly. As it stands, there are probably a fair number of us who have substantial collections of such files but lack the time, expertise, and software to modify the files. Moreover, there are other download sites (Tarakanov, for example, has all of vocal scores for Verdi and Puccini's operas available - complete with the offending logos, etc.) with substantial collections of such material, which really can't go up on IMSLP due to trademark concerns. Those of us with such collections could upload the file for cleaning to the FTP and those who have the processing powers could fix the files so they would be suitable to add to the general library for all to use.
