The Issuu Java SDK by Christophe Ribeiro is a work in progress to interact with the document publishing features of the API. However, it does include resources to access Key and Secret for testing purposes.
Several Months ago, Microsoft announced that the Bing Search API had moved to the Windows Azure Marketplace. This move would make the Bing Search API a paid service with a tiered structure. Developers have been given until August 1st, 2012 to transition to the new version of the Bing Search API.
MapQuest has launched another API on top of OpenStreetMap (OSM), the Wiki-like editable map of the world. The new search service provides geographic search results for any data added to OSM, such as streets or landmarks. Of note, the MapQuest API provides the service without any API Key requirements or rate limiting.