CheckInOn.Me is a “proactive automated personal safety system” that allows developers to create customized services that provide peace of mind to users. The CheckInOn.Me API grants developers access to a system that checks in on users and waits for a custom response to verify their safety.
Web APIs and mashups are not only of interest to the developer community. There are also research activities that look at how to improve various aspects of API design as well as services' and mashups' implementation and deployment. If you are interested in a cutting-edge research that may influence the future of Web APIs, then you should look at series of workshops on Web APIs and Service Mashups.