Congratulations Flat and Mrs. Flat! Such wonderful news!
Not sure, exactly, the advice you seek. However, put your fears to rest and enjoy every minute. Little girls are truly angels sent from God. I have been blessed with two of them and I wouldn't trade them for the world! Okay, maybe not the world, but I would consider it for a new widescreen monitor and a Z Board! LOL.
Have you narrowed the names to a few hundred choices yet?
Don't worry Flat, these things have a way of working themselves out as you go. All will be fine! Put your fears to rest buddy, and just enjoy every minute of the ride, 'cause it goes FAST!