The Google APIs Client Library for .NET is designed to give .NET applications simple, powerful, flexible access to many of Google's APIs. Services accessible using this library include Google Calendar, Google Analytics, Google+, YouTube, and more.
At the beginning of 2011 we reported that Collect had decided to drop it's API in order to change their offering to something more profitable. But now ReadWriteWeb have reported the disappointing demise of Collecta. This has the potential of being the first big failure of a well funded real-time web focused company, so questions need to be asked about why this happened and why Collecta weren't successful. Back in January of this year we asked "Is It Finally the End for Real-time Search Engines?" and it now looks like that very question is being raised again.
Discussion of Google's recent acquisition of Jambool has largely centered around its virtual currency platform, Social Gold. The power behind that platform comes in the form of the Social Gold API. Again, Google has bought a company whose API is central to its success.