The business networking site LinkedIn has now launched a new application platform they call InApps. It's an OpenSocial-based platform that enables third-party developers to create applications that get embedded into LinkedIn user's profiles. While this follows along the model used of Facebook, MySpace and host of other social platforms, it differs in its emphasis on being business centric in nature and, like the service itself, follows a much more controlled and button-downed approach. And like the LinkedIn API that we reported on last year, access is limited based on an approval process.
Stack Overflow, the very successful question and answer site for programmers, have now released their own API into public beta. The API actually works with all of the Stack Exchange sites, including serverfault.com and superuser.com, with more sites possibly launching in the future. The API is supported by the site http://stackapps.com.