English indie pop group XX just released their new album called Coexist. Their site contains a preview page of the album with a tracking app that visually displays its viral activity. A map shows how the stream of the new album has been shared around the world by one fan. Each curve begins with a Tweet, Facebook Share, or email and ends with the location of the new listener. The site is pretty cool and you get to hear their music playing in the background. Follow this link to check out XX’s Coexist Preview.