My ds just started rolling over at night about a week ago as well! I let him get in as much "rolling" practice as he can during the day. He can roll over back to front, and front to back. Of course, I place him down on his back to go to sleep, and if he's not sleepy enough, he immediately tries to roll to his tummy. :roll:
It's funny, cause my ds goes to bed at 8 p.m., and almost like clockwork about 3 a.m. rolls around, and he flips to his tummy. After a few days of him fussing about, and eventually crying, and me going back to flip him back over, he has finally figured out that he can put his head down, tuck that thumb in, and fall back asleep! It takes him a good 10 or 15 minutes to situate himself though, and he will occasionally cry out during this time, but not go to all out crying. He eventually settles himself. Now that he seemingly has it figured out at night, we're working on him figuring this out during his naptime too!
I still swaddle my ds when I put him down, and as tight as I can. He has his one arm out so he can suck his thumb, and when he does flip over, he has worked his other arm out as well. But I think the swaddle helps him get to sleep.
Stick with it! It has to stop at some point, that's what I keep telling myself anyway! :lol: