I'm going to do this: http://pinterest.com/pin/63239047/ with either pink for a girl, or blue for a boy.. then posting the picture on facebook ;)
We're not finding out at all. When baby arrives, we'll announce his or her full name, birthdate, height/weight, all that stuff. Everyone's kind of irritated with us for not finding out, but I'm super excited! And I'll be the first one to see it since we're having him/her at home in water and will just pick it up and look!
We'll find out at the birth and IF it's a reasonable hour, I'll let the kids go outside with pots and spoons to bang and they can yell it out! My mom will probably be here and get on the phone shortly after the birth... usually by the time I think of picking up the phone, everyone already knows!