With a headline of “Breaking Changes“, Facebook responded to last weeks hearing by severely reducing the data that is available to developers that use the FB Graph platform.
Some of the greatest reductions include:
Breaking changes are any changes to existing functionality that will take effect immediately and impact all API versions. These changes can be introduced at any time and will not be tied to a specific release.
All apps, including formerly approved apps, must undergo App Review in order to gain access to the API.
For a full list, read their developer blog.