First up, I have to say I LOVE this idea, however I think you may struggle to get people using it, but that's not to say it wont work. My first thought is temp

First up, I have to say I LOVE this idea, however I think you may struggle to get people using it, but that's not to say it wont work. My first thought is temporarily remove the subscriber and artist count from the homepage. While you're still starting out the low numbers may be a turn off. Get media coverage! When I first launched BugMuncher, all was quiet for a few days, then The Next Web published an article about it and the users started coming in. Admittedly that was dumb luck, but since then I've been actively getting more blog coverage, and it really works. As others have said, at this stage you need to get artists on board, maybe you could try some kind of sign up incentive, and then have further incentives for artists encouraging their fans to sign up. The design, while clean and very good, reminds me too much of a news paper, I'm not sure that will resonate so well with your target audience. Best of luck with it