Over at WebmasterWorld some are reporting seeing the old Google design. Remember the one with the directory link at the top? Could it be a caching issue or a cookie issue? Or maybe its Google messing with us. :)
For several hours, I've seen both the Directory tab back on the google homepage (as well as listed below each serp listing), and the older "colored in" adwords boxes.
Is this perhaps the end of a limited test to the new format they changed to?
This gets more interesting. Over at IHelpYou Forums there is a post on someone "Not seeing the category displayed for sites in the G directory." It seems as if this individual has always been seeing the directory tab and all of a sudden it is gone. Hmm...