Yep - our neighbors down the street are AP holders - and the husband works with my DH (same schedule), so their time off and ours often coincide.
On our first trip - I knew they were in Disney the week before, but didn't realize they hadn't already gone home. Our first night there - we headed to Main St. to see Spectromagic (the only night it was on that week!) We were sitting in the circle in front of the train station, when my daughter says - Hey Mom, look - that lady looks like Mrs. **. Sure enough - DH takes off and comes back with our neighbors!
We went back in Dec - and knew they were there - so we did meet up as we were both at the CR that trip!
They were there again in Feb. & Apr., and Mr. ** had been giving my DH heck about going at the beginning of July - too hot, too crowded. Of course, we didn't have a choice - the main purpose of our trip was to attend a conference for Tech students with our daughters! My middle daughter turned 13 while we were gone - when we took her out to the 50's Prime Time for her dinner - we almost died of shock, when they tapped us on the shoulder!
They had decided to go for a quick trip (Th-Tues) and had just flown in that afternoon! They knew we were taking our DD here for her birthday - and called Disney Dining - who told them when our ressie was!!

Luckily, it was a happy surprise. They were staying at a DD hotel till Sunday, then were moving onto property at AS Music, which was the same day we were checking into AS Music with our school group!
What a small world!