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Powerset has an interesting new search engine that claims to go beyond free text search and understand the meaning of your queries. While this is a claim that has been made many times (Autonomy, InXight) I will watch Powerset's ability to handle a larger more unstructured dataset before becoming convinced. It would seem that for the time being they are focusing on the public web. It will also be interesting to see if they sell their technology to companies wanting a search tool capable of searching internal private documents. In my opinion this is where powerful contextual understanding engines are most sorely needed.