I guess my opinion and sorry this is just my advise is for you to read and digest any useful information, but be yourself, and do not plea or beg for your wife, do for your children which is important and think of your wife not as a friend, but as someone you care for. It is difficult but I know that if she sees you as your supportive for the children and that you want her to spend a good time and you are not needy for her to comeback, maybe you may see a turning point.
I hope all goes well with you :-)
Keep me updated how it all goes with you, as I have started to keep a track with the forum, it is really great and I have ordered the book.
