Webhooks offer a far more efficient way to monitor changes to an endpoint than traditional polling. In this recent article on InfoWorld, Mark Geene discusses the technology and highlights three commercial implementations that put it to good use to improve the customer experience.
The U.S. Federal Government has been making a push to increase accessibility to data managed and maintained by various government agencies and departments. Recently Business.gov, the government's official web site for small businesses (sponsored by the U.S. Small Business Administration), has released an API that provides access to various types of data that will can benefit small businesses.
A summary of discussions from OKFestival on open data business models reveals a strong commitment to fostering an ecosystem, while many startups commence with a composite model with multiple revenue streams.