Ok, I know my response is a little late, but I am new here and have a few good ideas. Especially if she is still using it at night, and you are wanting to break her of that soon.
#1) Tell her there is a binky fairy. PIck a certain age or day, and tell her when she reaches that point, if she leaves her binky under her pillow that night the binky fairy will come, and take her binky's and leave her something in return! (Much like the tooth fairy.) Tell the binky fairy takes the binkys and passes them on to new babies that need them. Then leave her something fun under her pillow or next to her bed! A toy she wants, a new baby doll, etc.... Oh yeah, don't forget to sprinkle some glitter around!
#2) Take her to the Build A Bear factory. Let her pick any stuffed animal she wants, and after she stuffs it, when you are at the part you put the heart in it and make a wish before they sew it up, have her put her binky inside too.
Now she has a new friend that provides her with comfort, that she can sleep with at night, but still have her "old friend" with her all the time!
Hope these suggestions help in the future!