I've decided to wait to find out the gender (about 5 weeks left) before making the big FB announcement. However, I have been having a lot of fun telling people at work and on my swim team.
At first I was nervous about telling everyone, but now it has become second nature. A lot of people probably already knew since I'm sure the word travels (I had to tell my boss and swim coaches right away). Some people claimed to have known the whole 2 months I've known and were just waiting to find out officially.
The funny thing is after DH told his mom to tell his relatives, they've been posting about it all over his FB timeline, so if people look at his profile they might know. It's on mine a little too, so I sometimes wonder.