The Music Fan SE proposal has been gaining traction over on Area51. I know most of this site, besides being musicians, theorists, and students, enjoys music.
Hopefully if Music Fans gets to beta we will have a mutually beneficial relationship with them including migrating questions and a common, growing user base. This is the site we have been asking for, for quite a while, as a place to send those good questions about songs/bands etc that are off topic here under the song identification rule, and it is likely to have questions which will be migrated here.
Update 31 July: It is now in commitment phase, which just means it needs more people to sign up, so keep on telling your friends, colleagues, anyone you know who likes music, etc.
Update 25 November: The site has been in the commitment phase for a few months now and has 127 committed users. It still needs 73 more people to commit to move into private beta.