My son is 16 months old and we are working on weaning off of the paci right now. For the last several weeks, my son can ONLY have the paci during naps and at night. During the rest of the day, the pacis are put up out of view and out of reach (even at home). We had like 1 day of fussiness, and then he adapted. Now, he is beginning to show signs that he doesn't really need the paci to fall asleep, so I think our next step will be to try to put him down to sleep at night without the paci, but then put a paci in the crib in case he wakes up in the middle of the night and needs it to help him get back to sleep. Of course, the final goal is to just remove the paci completely.
I think you need to know your kid, because my son never does well with cold-turkey. His entire life, he has responded well to a weaning process. When it came to swaddling, to the bottle, and now to the paci, weaning has worked best for us. If your son is resistant to weaning, you might just throw all the pacis out and face the music some weekend, but I like the step-by-step program better. ^_~