Officially Google, but unofficially probably just some global warming believing oik in Google's search engine room.
I agree with this poster. I hadn't noticed it until someone else posted a warning on WattsUp, but try it yourself.
If you start typing the word climate in Google, for the past weeks it has thrown up emails or change as the next words because of the huge volume of web traffic on the leaked emails. However, I just tried it and although the search box remembered my own previous search, the word emails is no longer offered by Google itself.
Here's a screen capture from a few moments ago. You can see the cookie has remembered my own search for "Climategate", but that even after spelling most of the word the closest Google offers me from its own engine is Climate Guatemala:
Given the power of Google to restrict access to information in such an insidious way, it actually begs for a formal investigation. It's the weekend but I will flick a media inquiry to Google HQ and see if they can explain and rectify.
Wikipedia has already fallen victim, with its climate change entries largely controlled by members of the website RealClimate, who've become badly entangled in the CRU emails trainwreck.
For those suspecting conspiracy regarding Google, there is fodder for your suspicions according to a comment on the linked post:
a Senior Advisor to Google, Inc
Al Gore Advised Google About 'Search Quality'