YellowAPI functionality can be integrated in a mobile phone with the Yellow Pages iOS SDK. Resources include samples, tools, and methods that aim to visualize a working API on the iOS. This kit contains updates with ARC and iOS support, bug fixes, and listing object to match current JSON.
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.
Microsoft is one of the first--and certainly the largest of--customers of Wolfram Alpha's commercial API (our Wolfram|Alpha API profile). For math and nutritional searches, Microsoft's Bing now uses Wolfram results.