See this message.
http://forums.dlink.com/index.php?topic=4097.msg23466#msg23466
In a nutshell, all of these web streamers change the way they distribute their videos which will break Active TV. YouTube was the only one I was able to figure out how to get working again.
Hulu and AOL have been 'broken' for awhile.
Also, check out http://active-tv.blogspot.com/