K.,
He may be whining for the paci more because something is bothering him - separation anxiety, teething, a cold, whatever. Those are the things that make my daughter want hers more. Remember that this is an item that comforts your child, so you don't want to rip it away from him when he cannot understand why.
Dr. generally say pacis should be gone by 2, but many kids have them after that. I am doing what my mother did with me which worked really well (and is going well for us so far) is to start putting rules around it. I started with she couldn't take it into dance school with her. Now, I generally take it from her in a restaurant, the mall, etc. I keep one on me, just in case of a meltdown, but almost never need it. Daycare takes it from her except at naptime or if she isn't feeling well.
Because it is a gradual thing, there is less trauma. For the last hurrah, you might need to do the Paci Fairy thing, but I wouldn't do that until he is a bit older and can better understand. Ideally, at that point, he should only be using at specific times, like bedtime.
HTH,
C.