According to Kindle users in China, as long as you're using the GSM “Whispernet” for book download and browsing you can access sites like Twitter and and Facebook.
According to an AFP report, Chinese resellers are ordering the Kindle from America and selling them for about $200. As users begin to connect via GSM they are finding the device is completely open.
“I still can't believe it. I casually tried getting to Twitter, and what a surprise, I got there,” the paper quoted a mainland blogger as saying.
“And then I quickly tried Facebook, and it perfectly presented itself. Am I dreaming? No, I pinched myself and it hurt.”
Presumably the Great Firewall censors will quickly plug this hole but here's hoping China enjoys their Twitter for at least a while.