with dd1, a doctor doing an ultrasound told us, even though we didn't want to know
with dd2, we loved
having a real surprise.
this time, we want a surprise, too (it's a pretty great moment, we think, to find out right at the birth).
people will be assuming we want a boy, so i'm sure i can expect lots of undiplomatic questions... but honestly, we don't care about the gender as long as he/she is healthy (DH actually said he loves being a father to girls, and would be thrilled to have another one).