The Betable Ruby SDK by Francisco Gutierrez provides API communication to implement gambling into mobile applications, games in particular. Code available to add dependencies in developers' projects. It includes initialization and authorization.
Lately we're seeing a lot more talk about API monetization. Last week we covered TweetPhoto's efforts at encouraging developers to use the TweetPhoto API through a transactional payment model (one penny or so for each photo uploaded via the API). Last month we covered Bandsintown, which provides affiliate earnings via use of its Bandsintown API. And more recently Touchnote announced an affiliate payment model (with a whopping 30% royalty) for developers working with its image API.
Jigsaw, has announced additions to their RESTful JSON and XML API as well as a developer program designed to enable developers to query, share, and resell Jigsaw’s community-contributed database of company data and contact information. They came onto the API scene in June 2008 with their declaration of "Data Independence Day", which focused on providing free access to their database of company information (more details at our Jigsaw API Profile).