Not much has changed since. People are reporting success with some form of I/O and Telestream's web streaming solution. But all the "free" screen sharing solutions do not work well for a different reasons; bit depth, frame rate/rfresh, audio, etc.
I will be testing the IBC announced TalkShow from NewTek soon just for this purpose and will report on it.
I've had good success with Ustream, but for it to work properly you need a second computer running your streaming hardware. (in my case an older MacBook pro and a Matrox Mxo2) Trying to edit and stream with the same computer is not as easy, especially when both programs want to use the same blackmagic or Kona card.