This is hardly an "Easter Egg". Just a custom search results set like they have for so many other searches - examples:
<a href="http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=time+paris" rel="nofollow">http://www.google.com/search?sourceid=chrome&ie=UTF-8...</a>
<a href="http://www.google.com/search?hl=en&safe=off&q=whois+ycombinator.com&aq=f&aqi=&aql=&oq=&gs_rfai=" rel="nofollow">http://www.google.com/search?hl=en&safe=off&q=whois+...</a>
etc.<p>Sorry but are just fishing for traffic to your blog?
Apparently this is making more people search for the term "world cup".<p><a href="http://www.google.com/trends/hottrends?sa=X&oi=prbx_hot_trends&ct=title&q=world+cup" rel="nofollow">http://www.google.com/trends/hottrends?sa=X&oi=prbx_hot_...</a><p>Google: secretly shoving football down the US's throat<p>(and about time too! ;)