I am a US server player. Like all of you, I can't connect to US servers and US official website after the blockage. I did some research and found out there is a way to connect to US server. I subscribed a US Virtual Private Network(VPN) account and i am able to connect and play US WoW now. The theory is i am using my internet connection to connect to the VPN, then connect to any server or website u want. The VPN provider is
www.strongvpn.com. my plan is $45USD for 3 months. There is another US VPN provider
www.witopia.net. their plan is much cheaper $39.99/year. The speed of my provider is ok. around 500ms to 1.5k ms. sometimes, it is higher, but it's quite stable so far. I haven't tried witopia one, but people from shanghaiexpats forum said that it's good too. If u've tried witopia and found that it's good too. please leave your feedback.
For those people who play in EU or TW server, i think it will be better if u find some EU or TW local VPN providers. I hope my info could help u guys.