I've just added a web-based Namecoin whois tool and a few others:

* Web-based whois tool -- http://www.namecoin.us/tools/whois-lookup.php
* .bit whois server -- http://whois.namecoin.us/
* Domain price calculator -- http://www.namecoin.us/tools/domain-cost.php
* Block generation estimator -- http://www.namecoin.us/tools/generate-block.php