I left all my cats home when I got married, (which was 9 months before DS was born), but they are living by my mom, who will be watching him when I go back to work. I have let the cats see him and sniff a little, I was worried they would scratch him. They did try going in his crib at my mom's house but she gave them a spanking and they seem to understand not to go in it anymore. I was looking at a magazine the other day, I think it was OneStepAhead and they have a monitor specially for pets. It goes by the babies crib and looks and works like a regular baby monitor, except it just monitors for pets and the other end you put by you and it will let you know the cat is by the baby. This way you don't have to worry about the cat being in the babies bed. The only other thing you will have to watch is if a cat gets jealous enough it will start peeing all over the house or just on the babies things. We had one cat get jealous over a new cat and started doing this. There is nothing we could do about except get rid of the new cat. So if your cat gets jealous, depends on its personality, you may have to chose between the cat or the baby.
Nothing cures this peeing thing they do.