There are so many tools out to help you to understand the power of your community online. Like Twittersheep - it analyses the bios of your Twitter followers to give you a tag cloud, demonstrating the interests of your "flock". My @Gaymonkey account analysis is above.
This tool reinforces the importance of matching your community with you as an artist/label. Having a quantity of followers who don't care to join in on your conversation is not only ineffective, but misleading when it comes to mobilising them. Here the adage is true - its all about quality, not quantity.