Many sites are referencing Webbsnack for describing how to add a snippet of JavaScript to test out the new Google user interface, they are testing on some users.
The test looks like this, provided by Webbsnack:
It is a combination of several tests I have seen in the past from Google. Combing the drop downs with a new top bar to make this up.
As Webbsnack shows, you can test it our yourself with this JavaScript:
javascript:document.cookie="PREF=ID=fddb01133a87d314:LD=en:CR=2:TM=1177334998:LM=1177334998:GM=1:S=OOg0FEVzpPplxe9J; path=/; domain=.google.com"
Forum discussion at DigitalPoint Forums.