I don't own any maternity clothes yet, (hard to find here, and I don't/can't purchase online at this time), but I am wearing bigger sizes already. I have been looking for maternity clothes locally, but the best I could find were long sleeve t-shirts, which for the price, it would be cheaper to just go a size or two up in the regular clothes and get two or three, and grandma-esque sweaters. :P
As for question, who are you having to support you/who will be with you when you give birth?
Bmcneal, that sucks that there aren't a lot of maternity clothes locally. I got lucky with the thrift store last weekend and found two or three maternity shirts, and two more "big" shirts, one which I am going to try to alter and one that already has a flattering cut. I really like the empire-waisted stuff. And I've found a couple things on craigslist that I might buy. So I feel pretty lucky to not have to pay full price on this stuff. I know what you mean about stuff being so expensive for just being a plain long sleeve shirt. Even Target disappointed me.
As for the birth, my DP will be there. I didn't have him do anything for me the last time but I know that just having him be in the room will help me feel safe and strong. I'm having a hospital midwife but I don't know if they are going to be there the whole time. Generally I prefer to be left alone in labor.
For those of you who have other kids, what are you going to do with them (childcare, etc) while you are in labor?