One of my friends' kid was premature, almost the same as yours. It was pretty tough on him having to spend so much time at the hospital but his kid is perfectly healthy now at 2 yrs. He developed a little slower than most kids as far as walking and talking but he's catching up just fine now. He/she'll be good bro. Just be prepared to spend some time at the hospital
My sisters kid was a month premature. He had some problems keeping his milk down and some bad diarrhea for a month or so. Doc said his insides weren't ready yet, but he's almost five now and everything worked out fine.