Try Netflix's twitter. I think they tell that kind of stuff.
I want to know about this, too. I've had a terrible time finding things I want to watch using live streaming. I keep trying different titles and mostly striking out. I am typically looking for old tv series. A website that I can scan for titles I recognize and then can actually find available to live stream from Netflix would be awesome.
Use movies 2k, Motionempire. or letmewatchthis. All free.