Pace is babbling up a storm these days (what's the line?  "You spend the first few months of their lives waiting for them to talk and the next eighteen years wishing they would stop!" ) with lots of "da da", "ga ga", "blah blah, blah" (seriously!) and grunting noises. 

So I did some research (okay, a Google search for "typical baby first words") and found this article which will be of interest to both parents and any librarians who work with children.