Google Caffeine - the next generation for Google’s web search will be going live after the holiday.
The http://www2.sandbox.google.com/ has now been replaced with the message.
We appreciate all the feedback from people who searched on our Caffeine sandbox.
Based on the success we’ve seen, we believe Caffeine is ready for a larger audience. Soon we will activate Caffeine more widely, beginning with one data center. This sandbox is no longer necessary and has been retired, but we appreciate the testing and positive input that webmasters and publishers have given.
Matt Cutts posted that Caffeine will go live to only one data center. Oes Tsetnoc will look into this more after the holiday season though OES will end on December 15, I will still continue to give you update