Well...we have a roller!
T has yet to roll fully on to her tummy while in bed (unless while awake), but for the last few nights she is enjoying the side sleep position...and this morning, well she wont stay on her back.
I remember the first times the kids began to roll. Some at the most inopportune and unexpected times. But I also remember when they began to roll over at bedtime. I was always so paranoid I would keep waking up to go roll them back! Hasn't happened with T yet...but judging by this morning, it's only a matter of time!
(sorry for pic quality...camera is away, at least there is the iPhone!)