RT was a colicky baby. My mom and I used to take turns eating dinner so we could walk and bounce her until she passed out for the evening. The daytime wasn't quite as bad but the 6-11pm run was brutal. My heart goes out to you and MonkeyWife.
Some things that helped a little:
Mylicon drops-it's simethicone and inert so it's not absorbed but it breaks down gas bubbles in the digestive tract
Switching from milk based to soy based formula-if MW is breastfeeding try an elimination diet, www.kellymom.com is the best BF website EVER for anything related to BF.
Try putting SeaMonkey to sleep on his tummy. I know all this "back to sleep" business but something about tummy sleeping made RT happier.
Take time for yourself. And MW take time for herself. That might mean shifts for a while but it helps.
Temporary ban on weekend visitors. Schedule visits, some people might be a little put out about it but they aren't the ones dealing with SeaMonkey hour after hour either.
Things will get better. I promise.
Thankfully Arabella has been a lot easier than her big sister.