Microsoft Live Search overhauled; quadrupled index size, results revamped
Live Search has had an overhaul with (as the title says) a quadrupled index size, and completely revamped algorithms. Part of the new tech is it's own rating system for webpages based on things such as clicked links, and also greater integration with microsoft answers.com.
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I added an article on this topic as well, but from TechCrunch. Will be looking forward to seeing the new features from Microsoft.