Nice shots. I actually had a baby a week and a half ago and have been filling up memory cards ever since. Here are a few suggestions that I've been applying to the pictures I've been taking the past 10 days:
1) My most used slider in ACR is clarity. I reduce the clarity in almost every baby photo I take to create that creamier look.
2) Babies have soft skin, but our cameras/lenses are often too sharp and the baby's skin comes out looking flakey or rough. Try using layer masks and blurring (surface or gaussian blur) to soften the skin. Surface blur is great for keeping edges intact, and masks for ensuring the eyes, nose, and mouth remain sharp while the rest of the skin can have that soft look to it.
3) Overexpose. Even if my shots were coming out great on the histogram, I wound up punching the exposure or highlights to achieve a brighter image.
Hope these help!
Really good tips. I agree on overexposing a bit too. Babies have huge eyes, which are a real contrast, so pushing the exposure a bit will bleach out skin a touch (I actually think that that can negate the need to worry too much about reducing clarity) but will make the eyes and other facial features pop.
Window light, or bounce flash of a ceiling are really good too for soft lighting.
On that tip, I just bought a Lastolite Ezybox and - wow - perfect baby pics. Here's an example of results -
Another tip - Like all of us, babies can have all sorts of red blotches - dropping the red a tiny bit or better a B&W conversion is a good way of softening imperfections without using clarity or blur.