I could see being excluded if it was a guys-only party...but since there are other wives invited I find it pretty darn rude!
I'd be peeved. Just talk to DH about it. Maybe he just won't go at all to stand on principle that you should have been invited. OR... you both go and really piss off the friend.
To all of this. I personally would go with DH just to pi$$ the "friend" off.
Re: Is this a faux pas or am I just too Southern? (NBR)
What guy gets upset about not being in someone's wedding?
Show up anyway, tell him to clean the sand out of his vagina, and leave.