Don Park describes a "Web of Files" I really like this idea -- For a long time I've wanted a filesystem and UI where files could live in multiple directories (categories) at the same time. This basically turns the filesystem into a graph instead of a tree.. Yes, I know this is possible in Unix / Linux, but the user interface for this is too inconvenient. Actually, a good UI forthis would be a great feature for Nautilus, along with the "related" and website functionality in his example. One thing that I've found is that its impossible to remember where documents come from. In MacOS 8 (the last time I used it regularly), some programs would put the source URL into the Get Info comments. Alas, no such function in Windows or Linux.