The following is a glimpse of some cool search technologies being shown at TechFest 2009 by researchers from Microsoft’s worldwide labs in China, England, India, and the United States. From Live Search blog:

• GeoLife 2.0: A Location-Based Social Network is a GPS-data-driven social network on Microsoft Virtual Earth 
• Opinion Search 
• Renlifang: Web-Scale Entity Summarization is a web-mining summarization system that extracts information about particular entities from billions of Web pages 
• Color-Structured Image Search; a new image search interface that uses rough color layouts to indicate users’ intent (instead of using keywords only).