I've been using cloth diapers exclusively on my 11 month old pretty much since she was born. That's her, in the picture, wearing an one size duo from AMP. http://www.ampdiaperstore.com/
I recommend really researching your choice, because while for sure some diapers are overpriced, good quality, well-cared for cloth diapers have great resale. I will get back at least half what I paid when I sell my AMPs, which I am doing soon because I don't like them for stuffing and my daycare is particular. I now use BumGenius during the day, and they're great - but they DO fit big, so many newborns have leakage.
you can research a lot on diaperpin.com, and check out more info on diaperswappers.com
on the whole, it's way easier than I thought it would be. :o) I've written about it a bit on amostlygreenmama.blogspot.com and will be writing more.
and congrats on the impending arrival. :o)