Well a check with the sbs site shows that they are streaming their shows though apppears they are delayed in starting, but all else looks normal the channel data is still at
http://player.sbs.com.au/video/playl.../standalone/94 as far as I can tell the xml structure hasn't changed, so it looks like a server issue or they've altered their security blocking the napper as is (new port or new check in swf, etc).
Anywho, mce or the others with better knowledge than me will be able to tell for sure, my best guess at the moment is on a server issue choking the retrieval of the xml data