[jmarshall]

The problem with that one is you have to know where the file is. The trick is to use a hash of the file to detect dupes on scan (in case user scans new location) and if the file isn't there, check whether it might have moved (eg is the source gone as well?) and ask the user to correct things. The latter is something that wouldn't take too much to do right away - an ideal project for someone wishing to get their feet wet. The second would require some changes in the db which would be slightly more work.