More often than not all it takes to start a revolution is somebody who is angry enough to change the status quo. Ever since the dawn of social media sites the predominant business model has been variations of the walled garden approach to content originally pioneered by America Online (AOL). Today that walled garden approach manifests itself in the form of APIs that have been locked down by social media sites such as Facebook and Twitter.
Hellotxt, the service that lets you simultaneously update your status and read your friends' status across many services, has now released an API. There is a long list of microblogging and social networking sites that Hellotxt interacts with, ranging from Facebook and LinkedIn to of course Twitter and FriendFeed (see their home page below).
There is something to be said for simplicity, especially when it comes to applications that leverage web APIs for mobile devices. Enter Sparrow, an application for the iPhone, that serves as a good example of how a few web APIs can be elegantly implemented for use on a mobile device.