I use Palmers Coco Butter Lotion; that has helped me.
I have the same problem but i know most of the time if your boobs or stomach itch its because your getting stretch marks so dont itch it will make them worse. I use unscented lotion on my stomach and boobs both and it seems to help me.
I was wondering the samething mines have been itching so bad its driving me crazy...
When I was pregnant with #3 I found out that my breasts were waaay too sensitive for almost any soaps! Do not try lotions because it could make it worse! (I'd itch till it would almost bleed!) :( Try washing with *Plain* baby soap n see if it helps... Good luck!
Does it feel like a dry skin itch?