Klee - I really wouldn't worry about the rolling. I stressed when Izzy started rolling and would always put her back on her back when she first did it. The only thing that happened was she got really frustrated and sleep took longer than normal - and I always found her on her tummy later anyway. Elena is already sleeping on her tummy (her choice) or her side and is sleeping sooooo much better. I really wouldn't worry too much - they've all got pretty good neck strength now so you don't have to worry about face planting into the mattress. And OMG at your nephew walking at 7 months. When I said it wouldn't matter I'm not sure if I mean it hearing that!!