How can I get my 2 year old to give up the pacifier?

My 2 year old son still uses a pacifier for his naps and bedtime. He will not fall asleep with out it unless he's in a car, no matter how tired he is. He will just lay there and cry until you give him his "Paci" then he's out within seconds. So far its not bothering his teeth but I would like for him to be off of it before it does. That and his daddy continues to give me hell over it. It breaks my heart to hear him cry like that. He just turned 2 so its not like I can really reason with him just yet. Any auggestions??