Congratulations!
On a sorta gear related note, my wife is 'specting and she tried sleeping with a self-inflating "base-camp" size camping mattress on top of the bed last night.
She seemd to think it helped allieviate some poor circulation caused by pressure-points as she slept on her side.
We're taking our Cub Scouts to Cuboree in September and I will be bringing one of those air matresses. When I was 8 months pregnant with my son, I went on a three day trip with my thermarest and that no-sleep lesson is seared into my memory. LOL!