I am sorry to hear about the demise of your marriage. I didn't file but I can tell you how my ex let me know. We were in the middle of marriage counseling, and my ex turned to me and told me that he was ready to file for divorce. He filed about a week after he told me. About a month and a half after he filed, I was served at my home. I'm glad I knew beforehand.
Me - 48 (at time of 1st bomb) H - 43 married - 16 Jul 94 no children 1st bomb - (said he was leaving) - 3 Jun 06 2nd bomb (said he was ready to file) - 10 Nov 06 H filed divorce - 17 Nov 06 Divorce finalized - 20 Jul 07