I create my albums with Turtle (my favorite skin) and use the background music option (starting with the slideshow), using different mp3 files for each folder of an album.
It would be great if there was a possibility to have displayed title and interpret of the song currently played (e.g. on the left hand side), while viewing the photos. My mp3 files contain this information in the metadata.
Development of the Turtle skin has come to an end. It has been superseded by Tiger, and Tiger does display the titles of the music tracks. It takes the title from the file name, however - it's not pulling it from metadata.