Cue Hallelujah chorus.
He slept through the night last night!!! We put him to bed at 10PM and he didn't wake up until 6:30AM - when our fat cat Greta made an ungraceful dismount from our bed and woke him up. Yes, Owen still sleeps next to our bed. I think it's a combination of convenience and over-attachment (mine) that keeps him there.
I've been told on several occasions that 13 pounds is the magic weight many babies must reach before they begin sleeping all night. So I weighed him this morning and he is just shy of 13 lbs. Was it a strange Leap Day phenomenon or the beginning of something wonderful? I think I'll increase his number of feedings just to be sure.