Google is beginning to ramp
up its information indexing efforts to the point where nothing and no-one is
safe. In addition to making some headway into indexing
the Deep Web, Googlebots are now also indexing whois domain information. For
webmasters, whois needs no introduction. For those of you who don’t own a
website, an introduction will be necessary.
Source: http://www.googletutor.com/2008/04/19/google-starts-indexing-whois-domain-information/