Not yet. Looks like 4 more hours to go for live stream to begin. I'm following this thread for updates:

http://forum.nasaspaceflight.com/index.php?topic=33511.0

Edit:

Live stream will be at: http://english.cntv.cn/live/

Planetary Society blog: http://www.planetary.org/blogs/emily-lakdawalla/2013/1213091...