Excile, the advice in the article is actually right on target. You need to focus on yourself and stop pursuing her. I don't know what your w's intentions were in sending the article, but since she is filing for D I would assume that she means what she says. That said, it is not hopeless.
This is a huge opportunity for you to show her that you have changed, not through your words but through your actions. The outcome is uncertain. When we all get to this forum we want to hear that we have a great chance at saving our marriages, but really, we don't know what the outcome is going to be. But you do have a chance right now to turn your own life around, to be a man that only a fool would leave.
Keep posting and keep reading. I am sorry that you are here but this is a great place for support.