Sorry to hear that you're going to be going through all of this Grimlin, but from all the great responses, I think you can see that you are not alone. With that said, I'm going to pile on with so more advice from a slightly different perspective. From reading your post, I am going to assume that you haven't gotten the "official" notification yet. Before you get served with those divorce papers, there's a few things you really need to do to prepare yourself.
Prepare yourself for an emotional rollercoaster with mostly lows and few highs. As hard as it will be to do, set your motions aside and use common sense before you react to anything.
Hire the best attorney you can find. Talk to your friends that have gone through this before and find an attorney that is going to protect your interests and shield you from all the petty BS that a lot of divorces turn into.
If and when you finally get served, DO NOT read the complaint. Hand it over to your attorney to read and explain to you. Her attorney is going to write the complaint in such a manner that you will sound like the worst person to have ever walked the earth. Every attorney does the exact same thing. The lawyers know it, the judges know it, but it is done to play on your fears and emotions. Don't bite!
Make a list of what you really want if and when this divorce is finalized. This should be the bare minimum that you really want to fight for, because that what this is - A Fight!
Use the rules to your advantage. Everytime the soon to be ex-wife tries to yank your chain, ignore it. Make her leave voice mails, emails, or texts when she pulls this stuff. All of that is considered evidence. Your word that she said something in a conversation isn't.
Like Rockchalk said before, do not fight or say anything bad about her in front of your son. If you show up for a visitation and she pulls something, simply walk away. If it happens, make sure you take a witness with you on any future trips, or have a parent or sibling pick your son up for you. For some reason, many spouses try to use "the kids" as a weapon. If you can show her that it doesn't work, her childish behavior will either stop or give you further evidence to use against her where it counts.
For your own health - Don't leave Bass Resource or change other parts of your lifestyle. Going through a divorce is a big enough loss as it is, so there is no reason to further punish yourself by taking away the things you enjoy. Keep reading the posts here, and jump in if you want to. If you are worried that you may go into full rant mode and earn yourself some warning points, use pm's. I'm willing to take some abuse if you need it, and I'm sure others will too. You really need to keep as much sanity in your life as possible so that you don't dwell on this 24 hours a day.