Thanks AnotherStander, she told me that she wanted a divorce about six weeks ago, the "cold and distant" stuff started right away. The paperwork came soon after, so I know she was deadly serious. I pursued hard for about two weeks and she got more cold and even nasty. I have been DBing since. The first couple of weeks I slipped up a couple of times and tore into her behaviour; I stated that I was fine with the divorce, but not the rude and disrespectful way I was being treated. Since then I have really been distancing and not discussing anything other than household stuff, but at the same time I have tried to be pleasant and nice. I have also been 180ing big time (for me, not for her). As upset as I am about the divorce, I love the changes I have made for myself! I am assuming she has noticed my 180's too.
I just don't know what to make of her change of attitude in the last few days. I would not say I have expectations, but I am hopeful for the first time in a long time. Anyway, whatever her motives, your advice is good. I will not pursue and maintain distance no matter what!