You could get her some gender neutral swaddles, the Aden + Anais are really nice and you can never have too many of those!
I like this idea! Another thing that I really liked was when people bought us a super cute, more expensive outfit that I wouldn't have bought myself. I guess with little girls maybe that is more the norm, but with my little guy we got a lot of very adorable, but more practical clothing items like pajamas or onesies. We got a couple Ralph Lauren coverall outfits that are soooo cute but I seriously doubt I would have shelled out for them. He wears them all the time! So maybe you can wait to find out what the baby is then just go buy one really really cute, higher end outfit.