My second child has never slept in a cot - not planned - she simply refused to entertain the idea. However, she is now 9.5 months and is very mobile and able to roll over the pillows at either side of the bed. She hasn't actually fallen out but has been very close to it.
I don't actually mind sharing my bed too much - I did with my son (although he did sleep in a cot until the early hours of the morning every night) and he now always sleeps in his own room, since H was born when he was 28 months. However, apart from not being totally safe in bed on her own, after settling at 8pm, she also breastfeeds every couple of hours until the following morning and I'd quite like to reduce these since I intend to stop breastfeeding at 12 months (I said this at 6 months!)
I therefore thought that maybe I should try putting her into a single bed - poss mattress on the floor - in her room for at least part of the night.
So I am interested in whether other people have put babies into their own bed at such an early age and how successful it's been.