According to this tweet by George Caulkin of The Times, Hatem Ben Arfa has agreed in principle to deal that will make his loan stay at Newcastle permanent. No corroboration that I can see yet, so stay tuned for updates.
UPDATE: MirrorFootball also reports the story. I'm at late Christmas with the in-laws where cell phone signal is very weak, so I can't open the story, but the headline says he will sign. Hat-tip to @VanCanToonFan for the link.