Supercoin is now listed on novaexchange, i noticed their addnode section could use some updating, chainz has a better list as previously mentioned here
That's because Chainz has also old (offline) nodes on their list.
List of nodes at NovaExchange will grow in time...
And people, don't forget to open port 19390 at your firewall/router, you're Supercoin wallet will have more connections!