Yep Fee, River does that too!
It's either sleeping through or one wake/feed at night. He's slooowly sleeping through more and more. I figure it all depends on how busy/awake he's been during the day, and if he's sick or going through a growth spurt.

If you want him to sleep through, just make it your husband's night to get up for the baby - River NEVER wakes when it's my dh's night to get up!