I've been working in the dev branch on Drupal for a while, but since the majority of functionality is in place I decided it was time to start tagging releases. Already it has seemed to attract some good bug reports! The discography framework is working, and most of the basic functionality is there. Things left for a beta release: streaming music player, RSS feeds, better installer, theme improvements and general bug fixing.
You can download it here: http://drupal.org/project/pushtape