Well, from what I know right now:
The Cleganes have been building up good karma serving the King in the faith militant uprising, and now they're hiring mercenaries to reap revenge on the Lannisters for being expelled and hunted.
Tarth is sitting in the middle of the ocean, unused but still alive.
Oliver Arryn is pissed off at the King, feels unsafe and is becoming paranoid. He's renounced the Seven and is about to start serving Rhllor