The gadget assumes that Facebook entries have been pushed into the IBM Connections activity stream. When users then click on these entries the Embedded Experience shows more information for the particular entry which is read from Facebook.
Technically the sample shows how to use the Facebook REST APIs and OAuth from OpenSocial gadgets using the built in OAuth support from the OpenSocial container via gadgets.io.makeRequest.
Read the full article for details.
Tao Shang and Rui Qi Shi are the developers, Niklas only committer.