Another thing that would make Limewire more efficient. When checking to see if a song has already been downloaded, Limwire only checks filenames. Better would be to check the song meta tags and see as iTunes when configured to manage files will rename files to <track> <title>.mp3 which is not file name oriented but tag oriented.

As I mentioned earlier, metatags are becoming increasonly used with documents to make them easier to search for and look at more carefully.