Google Caffeine - New version of Google Search?

Google has just unveiled a “secret project” of “next-generation architecture for Google’s web search“.

What's New

The categories for the new search engine on are as follows: speed, accuracy, temporal relevancy, and index size. Here’s how we define those:

Speed: How fast can the new search engine load results?

Accuracy: Which set of results is more accurate to the search term?

Temporal Relevancy: Is one version of search better at capturing breaking news?

Index Size: Is it really more comprehensive than the last version of Google?

Please visit the web developer preview of Google's new infrastructure at http://www2.sandbox.google.com/ and try searches there.