The Whois Serverlist is now for other Webdeveloper as a XML file available.
All Whois Servers are listed with their Top Level Domains (TLD) and Searchstrings.
This list provides as much usefull information as possible.
A Whois Server can have a description. TLD are listed with their Second Level Domains (SLD). If there are informations like Network Information Center (NIC), Country and Querycounter known, it will be listed.