Firstly congratulations and good luck!
It could be worse. You could be like us - trying to have kids for ages before it happened and almost contemplating adopting because it just was not happening and we did not want to do IVF. Now our 4 month old son is the centre of our existence. Enjoy it - it is great fun...once they start sleeping through the night.
As I said in another thread, catch up on your sleep now!!