The Library of Congress announced the successor to Thomas.gov (the current site to access congressional information). Congress.gov will eventually provide access to the same information as Thomas.gov, and more; however, Congress.gov provides easier access to the data via a series of APIs.
There's a new way to get thousands of local points of interest into your web maps: the CloudMade Data Market Place. There's a fee for using the data, but otherwise it's as easy as the standard CloudMade API (our CloudMade API profile). For a few hundred dollars per year, you can add any restaurant in the U.S., hospitals in the UK to your map, or one of about 80 datasets.
eHive, online collection management system, grants access to its web-based organization system via the eHive API. Museums can integrate the API with third party applications, or developers can build mobile and custom apps that leverage eHive technology. eHive allows museums and curators to gather, share, and manage collections of all flavors and sizes directly through a web interface. API integration enables eHive users to gain traction through mobile, social, and existing networks.