I just read your post, very sorry to hear about your situation ("sitch"). You came to the right place- the boards here have been a very valuable resource for me in my own sitch. There are a lot of good people here that will give you good feedback and support. I would second the advice the previous poster just gave you. These boards are a resource for YOU, not your wife ("W"). Also, pick up a copy of Divorce Remedy right away.
You could hang out awhile her at Newcomers to see what other feedback you might get however I would suggest you consider moving over to either the Walk Away Spouse (where I hang out) and/or Midlife Crisis forums.
I can relate to the depression, you need to work to address that right away. The first thing I'd suggest is getting back to the gym asap if you don't go already. Exercising and getting back in shape will pay big dividends going forward. That and eating healthy.
There is a lot of information and feedback I and others can offer to help you get through this. We are all going through hell right now with our spouses, some of us further along than others. You are in a bad place right now but (hopefully with our help) you will become much stronger as time goes on.
Hang in there.
M: 41 W: 39 S: 11 S: 10 D: 4 1st contact w/OM: 1/19/09 EA began: 2/14/09 EA discovered: 3/1/09 I file for D 8/25/09 to protect myself _______________________________