One of the largest behind-the-scenes updates to Google’s search technology in three years is in the works. On August 10th, Google quietly began soliciting feedback for “Caffeine,” a new system for Web searching that is being tested.
Google makes almost constant changes to its search algorithms and infrastructure, but it hasn’t made an update of this magnitude since 2006, said Matt Cutts, a principal engineer at Google who is considered one of the driving forces behind the company’s approach to search.
Preview Caffeine to see how it might affect your company’s search result rankings. So far we have not seen a huge difference in rankings for Clarity Quest’s site or our clients’ sites. In all cases tested so far, the changes were actually positive for us. I credit this to the fact we build links the correct way through public relations, social media and rich content.
Feel free to post your comments to let us know what you are seeing.

I didn't notice much difference for client sites within the Caffeine sandbox either. There are noticeably fewer "Universal Search" results for now, which may result in less real estate up for grabs.
But you hit the nail on the head that fundamentally sound websites don't have much to fear other than a few jitters (pardon the pun).
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