Congratulations!!!! Boys are great, you can see my little goofball in my sig.
When we got our ultrasound, they could not tell what he was, and we did not think we wanted to know. But...we put one picture in an envelope to each set of grandparents, and wrote on the outside:
It's A ...
and then on the inside, on a post attached to the picture, we wrote:
Baby!!!!! hee hee hee
In hindsight, knowing the sex would have been great.