Oh, I can't believe the entire gammut of comments I've gotten! Of course, we're in a very conservative, southern area, so many people have never seen someone wearing their baby until me.
I often get "Wow, that's how the Indians/Africans carry their babies"
but also, "can the baby breathe in there?"
and, I used to walk with a couple of friends about 2mi 3-4days a week, and I'd usually use a stroller, but when DS was fussy, I'd put him in the sling or mei tai, and they'd say "Oh, isn't that going to hurt your back?" and they'd constantly ask me if I wanted them to carry him! I'm just like "No, this is way easier than trying to carry him, and my back doesn't hurt, I promise!"
But generally, most people say "That is really a neat idea. I wish I'd known about those when I had my baby(ies)."
So I started making slings for gifts for every baby shower I go to now and everyone is usually glad to get them!
ETA: Oh yeah, and my SIL said when I had my son in a sling to go into a store "You look like those hippie women I see at concerts who wear those to breastfeed their kids." haha!! I didn't even know how to take that, but I thought it was a good thing. hahhaha