Google loves to optimise conversion. They are constantly changing smalled elements of the search listings to find out what gets a better user response.
The latest change from Google is a small redesign that see a black navigation bar at the top listings outlining the list of the Google product suite.
This is not only viewable to people with a Google account but also to no sign ups a like. Have a look and see what you think.
In other news Google attempt to change Facebook with Google Plus plus has been been reviewed over at Search Engine Land. The new "Black Bar" user interface will feature heavy in the new design.