Today I started porting KDE's own fully asynchronous library which talks to Facebook - LibKFbAPI - to Qt5 and Frameworks 5, which should bring back the Facebook Akonadi resource for Akonadi-Qt5 and make it available for Plasma 5, including Facebook Contacts, Facebook Events, Facebook Posts and Facebook Notifications (displayed as regular desktop notifications).
So far the library can connect to Facebook using KAccount's data (more about KAccounts next week) and retrieve logged-in user info.
I expect the port to go quite quickly and the Facebook Akonadi resource should follow up shortly. I'm considering making KFbAPI part of the KDE Frameworks collection, but as it uses some (possibly unnecessary) kdepimlibs bits, it might wait a bit for that to split up and join Frameworks too.
That is all.