Ask HN: How do I move from my little pond to a bigger lake?

I am a web developer. I've been working on an idea of mine with friends. We all left our day jobs. We've built a product, we've got our first customers, people are happy, but we can't seem to move out of our little pond. We are based outside of the US, and so it seems that most of our connections are local. We've been marketing our product for small business and PR agencies. There seems to be a steady growth in our user base, and yet reaching abroad is so tough.

How do we take our leap forward? How do we get people abroad to learn of our product?

We've been struggling with this, and I wrote it down in our company's blog. I explain more of our product and pain.

http://kulu.lu/blog.htm

And here's a link to our product, a real super easy way to choose music together (shameless brag):

http://www.facebook.com/NotJustMusic?sk=app_182149675137227

What am I missing? How to move from localized to international?