OH! My LO woke for his pacifier4-6 times per night. Is it possible he is a paci addict? you may want to peek at the props board to get a sense of this... it can cause nightwakings...Once we got rid of the paci, he slept much better, esp. with his lovie.
also, have you tried moving his bedtime up a little earlier? Maybe OT sould be contributing?...
HTH