I've downloaded p2pool/jtoomim from Git and its running. Its been running a while (1hr~) showing 'p2pool is not connected to any peers' and 'Handshake timed out, disconnecting from 208.84.223.121:9334'
208.84.223.121:9334 is live and running. If you can't connect to it, there's a problem on your end, possibly with your firewall configuration or your internet connectivity. You should be able to browse 208.84.223.121:9334 in a web browser, for example.