Oh, ladies, we all know that none of us would really show up at a shower without a gift.
I would probably leave the "wish list" off of the invitation. It'll make it look cluttered and sloppy. But I would definetly list my registries! I get annoyed when someone doesn't have a registry!! It makes it that much more difficult for me to pick something out for them. For your odds and ends that you wanted to put in the invitation, could you just register somewhere like Target where they have everything under the sun??
Congratulations on your baby!!