Hapax's FindEngine is a search engine system somewhat like Autonomy, but better according to some accounts, due to its unique use of computational linguistic analysis. They have an interesting way of displaying results/answers:
Rather than delivering results in the form of links to documents that you then have to read to verify, FindEngine™ delivers answers in response to queries. The answers are returned in the form of sentences extracted from their original source...
There's a feel-good profile of the founder in Brainheart magazine.