OpenDNS is good
I heard about OpenDNS in some days ago. And I try it today. The result is very good. The most convenient is that even you type in wrong address in browser, it can give a right IP address back for you. If it can't give you the right address, then a search page will display. If you type a unmoral website, it will give you a security advice.
It's much better than Shanghai Online's DNS servers, I think.
The OpenDNS address is 208.67.220.220; 208.67.222.222.