I didn't eat much during labor, just a few bites of Lara bars and some hard candy. It just didn't sound good. I ate a big meal beforehand though... I arrived for my 41 week appt. with my midwife after having contractions for a few days, and found out I was 5-6 cm dilated. I was still pretty comfortable so she advised me to walk around a bit and get something to eat, since it was late afternoon and I hadn't eaten since lunch. So, DH and I walked to a cafe and I had a huge chicken sandwich, broccoli, a smoothie and a cookie. We have very fond memories of that meal together.

By the time I got back to the hospital, I was 7 cm. I labored all night and DS was born the following morning, and I credit that meal with getting me though. I was also starving after delivery, and also had a grilled cheese! With tomato soup. It was yucky hospital food, but man did it hit the spot.
I did drink a lot during labor, though. I thought I'd want something with some taste and some calories, so we brought along some Vitamin Waters. Yellow and red. DH got me one of those big hospital mugs and kept filling it with ice and diluted Vitamin Water. It was a good choice because it is less strongly flavored than Gatorade but still had some calories and electrolytes. I didn't have an IV and I felt totally hydrated the next day, it was great. I also had to pee a lot during labor, which was sort of a good distraction!