my dd took 3 naps until she was about 9 months old. i'd say if your baby seems happy, then go with the 3 naps and be happy for 3 breaks! :wink:
he will let you know when he is ready to drop the third nap. my dd started taking longer and longer to fall asleep at that nap, then she would just play the whole time in her crib. so when she started doing that, we increased her awake times so that she only took 2 naps per day. just my experience...