On the Mystery: Discerning Divinity in Process

I don't think I have a handle on what process theology is and how it differs from Openness theology. I know I like a lot of what Catherine Keller says here, but there is a certain vagueness to it and mostly she is critiquing classical theism. I think the way Greek Neo Platonic thought worked its way into the Tradition is worth critiquing and she does point out that one of the blind spots of the creed is Jesus actual life (beyond birth and death). My impression of Process theology based on this book alone, is that it means keeping things open ended.