I've been seeing more and more reports from around the search space of searchers now seeing the new Google top bar. This began rolling out back in November but not everyone has it yet, including myself.
A WebmasterWorld thread has some users saying they are now seeing it.
Here is what it looks like if you do not see it yet:
So if you start to see it soon, don't be surprised - more and more users are getting this new design, which is over a month old now.
Forum discussion at WebmasterWorld.
