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.
Yahoo has taken a major step in the evolution of search APIs with today's release of BOSS (Build Your Own Search Service). The BOSS platform lets developers build their own full-blown custom search applications on Yahoo's index of the Internet, the same infrastructure that underlies Yahoo Search.
Twitter today announced that it is launching a new offering that will give developers access to the full Twitter archive which contains all tweets going back to the first one posted by Twitter CEO Jack Dorsey in 2006. Previously, full archive access was limited to Twitter's enterprise customers.