Powerset, which provides a new relationship with web data via innovative interfaces and natural language processing, launched this evening. Take a look at this video:
Update: ok, some comments. A couple of things that people are going to get hung up on. Firstly, writers seem to be referring to the technology as context or contextual search - why not call it NLP. Not sure where that is coming from. Secondly (actually, this is more important) pundits are going to write about the wikipedia-only issue. They're not getting it. 90% of search results come from a tiny fraction of web pages due to the huge redundancy on the web and the differences between searcher needs and author/publisher intents. The task isn't to always search that huge set, but to get the answers to the user.