Yes, google.cn is live, but the logo, the input area, the button is just a picture,  once you click the input area, it will redirect to google.com.hk.

I think google will come back eventually, after all, it's really a very big market here.

Google need to obey the Chinese law and filter the contents, and Chinese goverment  need to do more to give people more freedom to learn, to talk about anything.