I've always wanted to take a stab at a script like this, but I haven't gotten around to it yet. You've got a good start. This script is good for clearing out junk text in the filename, but in it's current form it isn't capable of renaming to standard MP3 naming techniques such as
Artist - Filename or of even determining this information. Some other scripts you might want to look at are available in the
Audio : MP3 section at CPAN.