Cindy,
Yes, I had my BAHA implant (the titanium screw) done at the same time as my AN surgery. It added about 30-45 minutes to the operation, and having it all done at once seemed like a good idea to me! I believe that in some instances this makes the insurance hurdle a bit easier to cross since they don't have to figure in another separate procedure. My main motivation was that I live all the way across the country from my surgeons, wanted them to be the ones to do everything involved with my AN, and didn't want to make another trip out West "just" for the BAHA! You'll see that many other forum posters have the implant done later, under local anesthesia, and report that it's an easy procedure (i.e., no particular pain and a very quick recovery). Whatever you decide, I certainly endorse getting a BAHA -- it's a big help. Best wishes as you make your decision.
Catherine (JerseyGirl 2)