Currently I believe that the gnutella network developers are looking into an XML kind of metadata/database information about your files (LimeWire had been leading this for a while http://www.limewire.com/index.jsp/metainfo_searches and is working with other developers, you should check out the GDF if you get a chance). So that you can search gnutella for an author name, album name, and/or song name or track, (or even non-music related files), etc, and the file names dont have to have all kinds of long and weird file names with what ever type of syntax someone thought was cool, their metadata will hold this information in an organized way. This may in turn eventually help out ideas like yours.

You might want to look at that standard and see if its possible to create tools like you mentioned for automaticly organizing files, its still under review by the gnutella community I believe.