OOOOOOOOH you've had your baby!! I remember seeing you AGES ago on a thread in here and you were preggers. Congratulations, she is lovely!
With regards to co-sleeping, Oli came into bed with us from day 3 as he would never go down anywhere else. I adopted the safe co-sleeping position that I read about in the sticky thread in the Natural Parenting forum, and we never had any problems until a couple of months ago when he started to roll out of the bed, so we got a bed guard (he fell out 3 times - luckily we had a mattess by the bed - phew!). In the early days we never worried about him rolling out at all, but I'd say when they get mobile it's time to get a bed guard or move them to a cot.
Here's the leaflet showing the safest position to sleep in:
https://www.unicef.org.uk/Documents/Baby_Friendly/Leaflets/3/sharingbedleaflet.pdf
Co-sleeping is a wonderful thing as long as you're all safe and happy with it!