Checkout meetup.com - I am sure it would be a lot of fun to do one of those hiking meetups.
When X and OM come over, I never looked out - I usually am too darn busy getting the kids ready to go to care.
OM and I are civil with each other. He is an ok guy and the kids like him. I talked with him early on, but only so I could put my worrys to ease in regards to the kids. I pretty much have the attitude now of "you can have her - good luck with that".