You're doing great Jarhead. Just keep being the responsible adult that you are--that's the only way to keep from being sucked into the insanity.
From the inside insanity looks normal, and you can get lost in it. Sometimes a person needs to be separated from a situation in order to see it for what it is. If you and your W decide to reconcile, this perspective will help you to re-define the realationship in a healthy way. If not, your perspective will help you to build a healthy relationship with someone else.
Having said all that, the process still really sucks and I really wish you didn't have to go through it.
Try to take a break from all of this crud and have a relaxing Thanksgiving.