First, you have your site running on 74.207.249.155 but you have your DNS set up so that thehackedbrain.com goes to 66.252.1.36. This has nothing to do with Arc; you need to fix your DNS at your domain registrar or at whoever you've delegated your DNS service to.
Second, you need to change site-url* in news.arc so that it reads
"http://thehackedbrain.com/"
Third as evanmurphy says you need to run nsv so that it's listening on port 80, which is the default HTTP port.