Congratulations!
First of all, check out HypnoBirthing.com if you are interested in natural childbirth. I've taken 6 couples through the course and they all found it really valuable in helping them have calm, natural births even where there were unexpected complications.
Feel free to pm me if you want more info.
With regards to circumcision - I don't understand why it is common practise in the US. It certainly isn't in the UK and the majority of men seem fine to me
I personally think it should only be done in the case of medical necessity.
Wishing you and bump all the best