So, rolling. DD rolled from back to front for the first time yesterday. Last night I woke up twice to find her sleeping on her belly. Good thing we already started weaning off he swaddle! Should I be worried about her rolling herself over in the night?
Due 12/20/11 ~ Lost our Muskrat at 9w2d
4/25/12 ~ Our angel, Persephone James, is here!

Re: Sleeping on tummy
With DS (baby #1) I would run in to his room throughout the night to flip him to his back....DD (#2) has been on her back for almost a month.....it's all about your comfort level (which I assure you, will increase if this is your first baby!)
My DS rolls both ways (one of the early-birds on this board, and he just really wants to move!). Since he is doing that, I let him be if he rolls on his tummy to sleep (he usually does). I still put him down on his back and will continue doing so, but I'm not going to turn him every time he rolls. Especially because we are definitely in the 4 month sleep regression, and I need all the sleep I can get!!
I also have the Angelcare monitor with the motion sensor, which made me a lot more comfortable about allowing him to sleep on his tummy if he puts himself there. Just my opinion, though.