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in what might turn the most substantial upgrade to their core search service since the beginning, Google’s Marissa Mayer announced the launch of Universal Search as of today. don’t expect a completely new product though. Universal Search is basically all about blending search-results from Google’s numerous vertical search engines (think news, images, video, books etc. - we’re talking about 14 different search-indexes!) into a single, inter-ranked result-page. from an SEO-perspective, the most interesting question is how Google is going to rank results from their various engines against each other.

Universal Search should be rolling out for google.com within the next days. meanwhile I recommend reading Danny Sullivans extensive roundup on Search Engine Land, “Google 2.0″.