This is not a Caffeine update, Caffeine is not live. More coming soon.
There seems to be a lot of buzz going on at the forums about Google's Caffeine index going live on more and more Google data centers.
Let me give you some history on Caffeine. It went live as a public preview in August. Then in early November there were rumors of it going live before the holiday season. Matt Cutts said no way, it won't go live until after the holidays. But it did go live on a single data center, in the Google wild, in late November.
Now, it is after the holidays, after the new years and everyone is waiting for Google to flip the switch. Did Google flip the switch in the past twenty-four hours?
I am seeing tons of threads with people talking about major ranking changes. But there are only a few threads specifically thinking it is Caffeine related. We have threads at DigitalPoint Forums and an updated WebmasterWorldthread. The suspected data centers that Caffeine has been moved to, include:
I emailed Google, Matt Cutts and his team for confirmation - so stay tuned.
Update: A Google spokesperson told me, "we have nothing to announce today regarding Caffeine." Basically, it is not live yet and when it does go live, they will let us know.