This time around was not such a big deal as everyone knew we were trying again after our m/c last July. With that last pregnancy however, we had fun telling people.
All of our family and friends assumed that we weren't having any more kids and had no idea what was going on. We let the kids tell their grandparents and they all thought the kids were joking.
It took a lot of convincing to get them to believe it but they were all thrilled.