Google Caffeine

Google has unveiled Caffeine, a "next-generation architecture" for its Web search platform. The retooled search engine is said to be faster, more accurate, and more comprehensive than the current Google search setup.

Google is by far the Internet's dominant search engine -- it accounted for about three-quarters of all U.S.-based searches in June, according to Web metrics company Hitwise -- so any change in its formula is bound to create plenty of questions. Get Google's new Caffeine system, what it's all about, and what it means for you.