1. Instead of putting CSS in the plugin create a reference (class?) so that the style can be referenced and maintained in the theme Style.CSS file (other plugins do this). Maybe you could make this an option to allow for both or at very least make it an expandable text box...it is very hard to work with all the css in the tiny area provided.
2. Also more control (Styling) over the text fields would be good
3. Don’t display coma if no price or time entered
4. Each Track should have field to enter artists on the track and display in the tack list (just like iTunes does)
5. Allow for more than three buttons
6. (Low Priority) Option to automatically create a separate page or post for the Record/Album (so it can be pointed to via a URL Link)