Google has just announced that for the last several months, a large team of their staff have been working on a secret project: a next-generation architecture for Google's web search. They've nicknamed this new search engine 'Caffeine'
"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."
For those of you who are interested you can check out the developer preview of Google's new infrastructure (link removed as it no longer exists) and try searches there.
I'm keen to hear people's opinion on this and what you notice about it.