It looks great. I think you should state clearly before the "Register" step / button that it's only available in the US at the moment. I looked around, I liked

It looks great. I think you should state clearly before the "Register" step / button that it's only available in the US at the moment. I looked around, I liked the idea, I wanted to see more so I signed up and ended up having to chose a location in the States (which I can't, obviously, being in Europe).