Google is experimenting with a new search layout. This layout looks cleaner and offers better control on the search results. The results are scalable with time, content type and location. The search button has been merged into the search box giving it a different look.
This new search interface packs in a lot of result in an excellent layout and I give this layout a thumbs up over the present one. Here is a screenshot tour of the changes.
The Search Box
The Page Navigation
The Complete Page