Tafiti, which means "do research" in Swahili, is an experimental search front-end from Microsoft, designed to help people use the Web for research projects that span multiple search queries and sessions by helping visualize, store, and share research results. Tafiti uses both Microsoft Silverlight and Live Search to explore the intersection of richer experiences on the Web and the increasing specialization of search.
Click here for Tafiti
Well that's how the official FAQ descibes it. In practice - WOW! Animated searcing is too simple, however Silverlight is a big part of Tafiti, and the search experiance is QUITE different to the same old, same old search we use currently.