I'll be wearing my birthday suit, just like the baby :D
I'm not an exhibitionist at all, but I also feel very little weirdness at being naked when it's the most practical thing. I find bras annoying during every day life (though I still wear one 99% of the time I'm in public) there is just no way I'm going to want one on during labor! Also, I have a weird hang up about wearing a top and nothing on the bottom. It just feels too much like going to the bathroom, which is somehow more shameful than just being completely nude, in my head.
Last time, I went into early labor in the evening, and I put my pajamas on and went to bed to get as much rest as I could. Early in the morning my water broke and soaked my sweat pants. I put on dry underwear then, stuffed with a prefold so I wouldn't leak water all over, but I totally stripped when I got in the birth pool a few hours later, and stayed naked after that. In fact, ds and I were both pretty much naked (aside from our diapers, lol) for the next couple of days, because it was July and we had no air conditioner, and I had no visitors. My friend who took pictures still managed to get a few shots with no boobs hanging out, even after I had stripped.