A Digg community member, suspicious of some top links, used the site's Digg API to uncover a 159 fake accounts. By comparing the stories voted on by these accounts to other stories, he discovered what appeared to be directed fraud and what Digg now calls "tests to find spam vulnerabilities." We spoke to the community member to learn how he used the site's API and what he learned.
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).
Online diagramming service Creately opened its Creately API to the public this month, and with some surprisingly innovative features. While providing obvious features to make its service available to outside developers, and several "above and beyond" features, such as easy embedding of diagrams, Creately has done something fairly unique: open up its own, web-based file format for other developers to use.