Another great tip by way of Roy Zur of Cybint. View DNS Info, http://viewdns.info/ is a site on which you can conduct research into the background of internet domains. Here's a run down of just four tools on the site.
The Domain / IP Whois tool will provide you with information about the registrant for a web site and its server.
The Reverse Whois Lookup tool lets you find out which sites are registered to a particular individual.
Find the geographic location of a specified IP address, with the IP Location Finder tool.
. . . and finally, use the Chinese Firewall Test to determine if a site is blocked in the People's Republic of China.