We have just gone cold turkey with the pacifier 5 days ago - DS is 12 months old. He was waking several times at night and I'd pop it back in, but he often still cried for 30 minutes or more and I was suspicious that the pacifier was making this worse. Nonetheless, I was very very worried about losing it, as we relied on it heavily for getting him off to sleep.
First night, we put him to bed without it, he cried and we did PUPD for 30 minutes before he went to sleep (standing up at the side of his cot!) That was hard. However, he slept from 8pm to 6am (first time ever) that night! He only had a brief cry and put himself back to sleep at 4am. He took 10-15 minutes to go off to sleep for his daytime naps the next day, but it was minimal stress, compared with what I'd been expecting. Next night he slept from 7pm to 5.30am. I can't believe how easy it has been. Last night he woke at 1am and didn't go back to sleep for half an hour, but that's the worst it's got.
He hasn't connected with any other comfort object so far. He has been a little more clingy during the day, but not upset - if anything, he's happier, and doesn't seem to miss the pacifier.