All pregnancies are SO different! I would say for the intensity the intermediate bootcamp with a few modifications. I heard once about a woman who completed an Ironman 2 weeks after giving birth! If you stay active during your pregnancy, chances are you'll bounce back faster after... Just listen to your body, it takes a lot of energy to build a little person!
I saw it too on Youtube (Bodyrock baby). I guess you could find a few videos there...
Again, I'm sure it all the Kegels! I was doing all sorts of contractions: the classic 1-2-3... , hold for 5-30sec. , go up the ladder: start with light up to strong then go back down... It was actually even easier with my son and he was 10.6 pounds :-S
Good luck to you for the Big day ;-)