Back in August, Google announced the launch of their next generation infrastructure for Google’s search engine index. Google Caffeine would include changes in crawling, indexing, and ranking algorithms which means those changes are only infrastructure related and includes no UI update:

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.

As Matt Cutts said, Google Caffeine would be fundamentally a big change for Google and is a complete rewrite of many parts of Google indexing system, which means Google will do everything in their power to diminish algorithmically focused search engine optimization efforts. (more…)