I always feel both elated for our friends upon hearing this kind of news, yet completely distraught and empty at the same time. Every pregnancy announcement is a little like a punch to the stomach. It's hard to not be jealous of the innocence of pregnancy that they are experiencing...which I will never take part in again. I always think (with a little bitterness, I will admit), "when will it be our turn? We've waited long enough."
I wish our friends all the happiness they deserve. I just hope it is our turn to be happy someday too.