All of my close friends are having babies right now, and most of them are desperate for non-stupid nursing bras--not really a registry item, but a great BFF gift. Bella Materna makes awesome lingerie, even in odd sizes. It's guaranteed free of horrible chemicals, and you can convert a lot of it for regular wear. There's a gift card option, and the staff are extremely helpful, even by e-mail.
I mostly drink dark beers. But being a lady, I know a lot of other ladies--many of whom refuse to drink beer. They will, however, drink this, which tastes like soda, except more awesome. If you, like me, will not abide neon malt liquor sugarbombs in your home and are hosting a summer party in which cocktails would be inconvenient, this is an excellent solution.