My wife is currently in her 8th month of pregnancy. We have not noticed any real changes in our dog's behavior.

Kinda along those lines, we made sure our dog had no plush toys so she wouldn't confuse them with the baby's. Tonight I am going to start training her to leave baby toys alone. Any other things people have done when prepping their dog for a baby? (Someone recommended Child-Proofing Your Dog which is on amazon.com I found is mildly informative. Most of the stuff was pretty common sense for people familiar with dogs)