Ryn,
How much sleep does he get during the day then and how much sleep over a 24 hour period? Does he have anything wrong physically/medically ie. windy tummy, reflux/colic which might be keeping him awake? Also, is he getting adequate feeds during the day to ensure he is ready for a long stretch of sleep at night?? My MIL would suggest to you starting solids at his age to help him sleep/settle (1tsp rice cereal a day, gradually increase). I am going to start my 3mth old on this soon despite recommendations to start at 4-6mths. Being a boy, I think they need HEAPS of food as they grow so fast. They "used" to start solids at 3mths or when baby reached 10pounds+ when I was a kid. Who knows, it could be worth considering for your boy.