Congrats and good luck.
I used to tell my wife I was going to give her twins. When we found out she was pregnant last year, I kept teasing her. Then her OB sent her for an ultrasound because she "felt big" and the OB suspected twins.
Well, we only had one, and he was born a week and a half ago. The past week and a half of my life has been the best ever.
You'll have your hands full, but it will be worth it. I might not have the longtime fatherhood experience like some of the other guys here, but I can tell it only gets better.
-Lenny