Gadgetopia

Wolfram Alpha: This is getting a lot of buzz. Early previews (screencast — I haven’t watched it) are apparently quite good.

Wolfram Alpha (also spelled WolframAlpha or Wolfram|Alpha) is an answer-engine developed by the international company Wolfram Research. It is an online service that answers factual queries directly by computing the answer from structured data, instead of providing a list of documents or web pages that might contain the answer.

[…] Wolfram Alpha is not a search engine, as it does not look up answers to queries on an index of web pages or documents. Queries and computations are similarly posed to it via a text field, but it computes answers and relevant visualizations on the fly from a knowledge base of curated, structured data.