Using matrix-appservice-purple (https://github.com/matrix-org/node-purple/tree/master/appservice https://github.com/matrix-org/node-purple/tree/master/appser...

Using matrix-appservice-purple (https://github.com/matrix-org/node-purple/tree/master/appservice https://github.com/matrix-org/node-purple/tree/master/appser...) one can even use jgeboski's PRPL to connect to FB from Matrix :) (although the bridge is pretty alpha right now). (Also, thanks for the vote of confidence :D)