Well, she's not really a toddler (almost 10 months), but she sleeps in her own crib. Occassionally I'll bring her to bed with me if she is being extremely clingy and won't sleep on her own, but usually being in bed with me doesn't fix things (although I like sleeping with her snuggled up to me!).
My 3yo sleeps in her own bed (shares a room with her older sister) for the most part, sometimes she'll come into my room in the middle of the night and sleep on the floor. I don't mind when she does that.
