We kept our DD1's name a secret until birth, we told everyone her gender but kept her name a secret, succesfully for over half of the pregnancy!
DD2's name we decided to share. Alot of people know what our boys name will be, we have had a couple of boys born into the family in the last couple of years and I let them know that we had chosen the name Mason and that it was imprortant to us, if someone had used it we would have used it anyway. So, if this baby is a boy everyone will know his name however if it is another girl I think I may keep it a secret I would love to keep the gender a secret (from everyone else, not us) but I don't know that DH could go the distance .

I say, keep it a secret. It is lovely to have a suprise.