CONGRATS!!!
My friend just went through this- the baby was a MAJOR surprise and they were not expecting him at all. Her DH deployed and she found out she was expecting three weeks later. They video chatted a lot- so she somehow set it up so her computer would record the chat. They started chatting, she asked about his day, he asked about her day....."It was good, I was busy. I went to the store, bought dog food. Then I went to the doctor; we are having a baby."
She said his reaction was PRICELESS. And they have it on recorded which makes it all so much sweeter!
If webcams aren't possible- I would send him some sort of package, but tell him that he cannot open it until he is on the phone with you. Have him call you and open it on the phone- so that you can hear his reaction- it is hard to have a pregnancy alone, so you want to be 'together' for some of it, kwim?