Once the mouthpiece and aggregator of the blogosphere, Technorati lost its luster long ago. And now it's lost its API, too. The developer page promises a new API but also makes one thing clear: the old one is gone.
As far as web search tools go, few have generated as much hype as Wolfram Alpha. The service, which bills itself as a "computational knowledge engine," differs from search engines such as Google, in that it does not return lists of web pages. Rather, Wolfram Alpha attempts to calculate answers to user queries. For example, a query of "los angeles county median household income" will return the result "$43,518."