My suggestions first for a gift for the mom who seems to have everything - Diapers, wipes, or better yet a basket she can use in the nursery that contains infant tylenol, infant motrin, mylicon/gas drops, baby lotion, baby soap (those Huggies One use baby cloths are awesome for the newborn time), powder, desitin, and syrup of ipecac etc.
It's those small things that even I as a mom of 4, forgot about when buying for the birth of our fourth baby (it had been 4 years since we had a baby in the house). That was THE most thoughtful gift we received.
Clothing is always great, but NOT the newborn size....get something basic in bigger sizes, like by the time my daughter started wearing 12 months (right now) I was OUT of all the cute stuff and it's hard to find those bigger sizes at rummage sales and stuff for those "basic" pieces (i.e. onesies, sleepers etc depending on when baby is due).
Another great idea for the basket of stuff - baby clothes hangers (only like $1 per pack at Target etc) so she can hang all those cute little newborn clothes everyone else is giving her that the baby will probably never get a chance to wear LOL!
Now as for pamper mom - make it a MOM SHOWER rather than call it a baby shower - on the "invite" to people (wether this be paper you hand them or verbal invite) encourage guests to focus on MOM AND DAD!!! Gift cards for dinner (from places that deliver or offer curbside pickup) so they can have a great meal without sleep deprived mom having to spend her time in the kitchen. Bath products for mom and a few magazines that dad might like for the time in the hospital. That first shower after birth is THE best shower I have EVER taken in my life LOL and dad will appreciate the reading material for the hospital when it is a hurry up and wait situation.
A basket of "snacks" for mom & dad for the hospital (though she might get annoyed since typically doctors will not allow mom in labor to eat) - things like granola bars, juice boxes, peanuts (if mom is not allergic etc), that sort of thing.
Or best yet, if you know her well enough, make up a "certificate" for x nmber of home cooked meals from YOU after she gets home from the hospital. I had a group of ladies do this for me from my moms group, they rallied together and took turns for about a week showing up each night with dinner for myself and my family after we got home from the hospital. Or go ahead and cook up some things that can be frozen and then "gift" those to her (lasagna, baked pasta dish, etc) that you can "preprep" or fully cook and then freeze so all she has to do is pop in the oven and then eat!
Those are my ideas, as I think of anything else I will find this thread again and post!
Hope that helps!