Co-Sleeping with your child

Where do you stand on co-sleeping? I co-slept with both my boys, and loved it! It made nursing at night so much easier. I went to a conference recently put on by a national organization who I normally respect highly. Their new campaign is that co-sleeping is dangerous! I don't agree. I think there are situations in which co-sleeping is dangerous, but practices as it has been for hundreds of thousands of years, it is actually the biological norm. There's plenty of research out there in support of co-sleeping. So, I just don't understand how a breastfeeding protective organization can slam co-sleeping so much. Anyway, what's your opinion on co-sleeping? Did you or do you currently co-sleep with your little one?