They also removed the warning that the user's search results were being filtered [2].
To the best of my knowledge, the current status: User visits Google China - http://google.cn - This is a hyperlink to Google Hong Kong on the front page - IF user searches via Google.cn, the search results will be filtered by China not self-censored by Google. They will NOT be presented with a warning anymore. - IF user searches via Google.hk, from mainland china, the same thing will happen and the results will still be filtered. [3]
At this point, I don't believe the link to .hk Google serves as much use as it does a political statement.
[1] "Google stops Hong Kong auto-redirect as China plays hardball" http://arstechnica.com/tech-policy/news/2010/06/google-tweak...
[2] "Google's dropped anti-censorship warning marks quiet defeat in China" http://www.theguardian.com/technology/2013/jan/04/google-def...
[3] "China censors searches on Google's Hong Kong-based search engine" http://www.washingtonpost.com/wp-dyn/content/article/2010/03...