We will probably find out. dh definitely wants to, I am on the fence. I've actually been in the want-to-be-surprised-at-the-birth camp pretty much my whole life, but actually being pregnant has changed my mind a little. I'm just not sure what to buy/register for if I don't know the gender. I've been looking, trust me, and have not been finding a lot that I'd be comfortable putting either a boy or a girl in. And honestly, I'd kind of like to just have an answer when people ask what we're having, instead of dealing with the reactions to us not finding out. I know - it sounds weak. But I'm already dealing with people's reactions to the fact that I'm planning an unmedicated birth in a birth center, and that's a far more important crusade for me. But, barring medical issues, we're only doing one more ultrasound (besides the one done at 8 weeks, also at my dh's insistence), so if baby refuses to reveal his/her gender at that point, we won't be doing any more to find out. We have picked out baby names, and the two of us will probably call the baby by name when we find out the gender, but we won't tell anyone else, and we won't be buying/making anything with baby's name on it till after baby is born, because I can't decide on a final name until I've actually held the baby. I know my parents went to the hospital set on naming me one thing, and then decided that it just wasn't the right name after I was born. I also have a brother who was called a girl's name (the same one intended for me, in fact) throughout my mom's pregnancy, and it didn't seem to hurt him any.
On the other hand, I'm hopeful that we'll have a surprise with a future pregnancy, should there be any. Once I already have stuff for one gender of baby (some of which will undoubtedly be reusable for either gender), I'll be less worried about it.