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.
There are now 700 social mashups in our mashup directory. Social apps are growing quickly, as we noted when the directory reached 5,000 total mashups. Social mashups now make up 9% of the directory, up from less than 3% in 2008. The growth has been pushed forward primarily by two social stalwarts: the Twitter API and the Facebook API.
Facebook has updated an API used by third-party applications to that allowed for cross-posting. The change breaks this functionality and one of the biggest impacts was felt by Twitter. Twitter users will no longer be able to create a Tweet and share it easily to their Facebook page.