I really love the idea, and the design is really nice/easy to get. The website seems to slow my firefox down a bit.
I tries the battle in HipHop/Rap and almost has always the same songs which is less fun but I guess you'll need to have a lot of uploads and Rap might not be the best genre to try out first.
A/B keys might not be the best keys to choose a song anyway, at least on an azerty keyboard they are pretty far of each other and it's harder to chose a song quickly!
Edit : The link to change the change for a battle seems really small and I did not find it at first. When coming back to the screen asking for fair shake/snap judgement maybe add a button to change genre if we want?
Edit 2: It seems that we must sign up to test the site. Why the change of heart after opening it? It's the kind of site I want to test before, once again, giving my email...
