howdy! I am 6 1/2 months pregnant with our first, and we've decided to go with Mommy and Mama (we live in Vancouver BC) hence Mommy instead of Mummy. But you know, we are Mummy Claire and Mummy Nat to our dog, so it might be a hard habit to break. Our friends with kids tell us that the kid will basically figure out what works for them and often what you choose doesn't stick anyhow. A friend's 3 year old has recently started using their first names much to their surprise... but he'll probably shift back to calling them both Mama soon....

we'll see - I'll keep you posted

good luck and enjoy!
claire