My DD was just over 2 when it was taken away. She had just started having tantrums and throwing things. During one such tantrum, about an hour before bedtime, she held up her dummy as if to throw it. I warned her not to, saying "if you do you will not get it back". She did and I found myself in the position of her going cold turkey.
That night was awful, but it really did just take three nights for her to not even ask about it. During the day, when she would ask for it, I would just repeat that only little girls had dummy and that she had given it up (not sure if she understood that). She was at nursery on day 2, so I made sure they new about it and they were equally firm. Apparently when told she had no dummy, she would turn to her younger friend who still had their dummy and said, "big girls don't use dummy."
However, I would say that I am not entirely sure that she was ready to get rid of the dummy, although I certainly was. She tends to suck her fingers when upset now and I have caught her with her thumb in her mouth when she is tired. But when actually going to sleep she is happy to have nothing in her mouth.
Sorry, I'm not sure if this was much help.