Suprnova is working fine if suprnova is down the trackers will work as suprnova dont have there own tracker and all the torrents on there use public trackers. Suprnovas has around 3 or 4 mirrors at a time so if one gets shut down there's still back ups

If you have recently installed SP2 u need to switch off your windows firewall or configure it to allow the ports that the client/trackers use or u wont connect to more than 1 torrent at a time if your lucky!!