I just fixed a bug in my drupal tune module so registered users can now actually upload their tunes to shareyourmusic.com.
It turns out that I had the acccess hook declared as: function tune_access(), which is how it was in the original file module, when it should have been: function tune_access($op, $node)
The result of that was only an administrator could upload tunes, not a regular user, even though upload access was allowed.