Musings about co-sleeping directed to no one in general...
I think it's interesting that co-sleeping was quickly singled out as the possible culprit in my post about Zari's wanting to nurse often at night. I feel that I sleep much better because I co-sleep. (See some interesting research on co-sleeping from Dr. Sears' website.) I can monitor my baby without being fully awake. Sometimes I sleep with my hand on her chest, or holding one of her hands. It's so comforting. I can also nurse her within 5-15 seconds after she starts to stir, all without getting out of bed or out of the covers.
I find it analogous to our medical culture's "support" of breastfeeding?--you know, breast is best but as soon as any breastfeeding difficulties arise, the magical solution is often "supplement!" Poor weight gain? Supplement! Poor latch? Supplement and give your nipples a break!
Breastfeeding interferes with sleeping, because you could have dad formula feed at night. But that is a non-issue at my house.
I did stop co-sleeping last night. With my dog. We all slept much better with our 80-lb dalmatian off the bed. Imagine that!