There is an (automatic, I believe) Tweeter of questions for our site:
If you follow it, your own followers and the ones you follow will have a chance to know about it through Twitter's following recommendations, and then receive tweets about recent questions asked on this site.
You can also put it in twitter lists related to music that you created.
Update It turns out there is also another automated twitter account:
which has a much greater group of followers, so it may be more useful...either way, they will help us get more visibility.