On Monday Google did something out of character by announcing a pre-release viewing of a major update to their algorithm they nicknamed Caffeine:
For the last several months, a large team of Googlers has been working on a secret project: a next-generation architecture for Google’s web search. It’s the first step in a process that will let us push the envelope on size, indexing speed, accuracy, comprehensiveness and other dimensions. The new infrastructure sits “under the hood” of Google’s search engine, which means that most users won’t notice a difference in search results. But web developers and power searchers might notice a few differences, so we’re opening up a web developer preview to collect feedback.
The sandbox URL for the new update is http://www2.sandbox.google.com – Check it out and see if you notice any difference with your rankings. Please post any interesting findings as a comment on this article. Read more…

Earlier today 

