There are so many musical genres (and sub-genres) these days. What happened to the days when it was just punk or hip-hop, just rock or disco?
My friend Josh is a great designer and also the lead singer of neo-awesome, transient new-wave, post-modern pop-punk band Escape Escape. He just set up a Red Bubble store for their tshirts which he created.
Check out their tshirts here and their music here. I don't like genres - just listen to it and give it your own label.