another family-bedder here... just wanted you to know it's not at all unusual for a 1yo to not be sleeping through the night. It's probably more the norm than a lot of parents want to admit. My dd8 first slept through the night at 18 months old (and only once in a while then), but ds6 slept through at a few months old. The only different thing I did was dd didn't full time sleep w/ us till a bit under a year - because I was nervous about the blankets and rolling on her, etc. When ds came along, I was no longer nervous and he literally slept in my arm from day 1, including in the hospital. He's my "sleeper", and can fall asleep w/ or w/out me today, whereas dd still wants to be attached to my uterus!
And dd didn't really sleep "good" through the night till 5 years old (i'm not kidding!) She's a tosser/turner, sleep talker/laugher, wakes easily, etc. Whereas ds is out like a light in minutes, for the whole night. Who knows what makes them like this... my ped used to say it's the first-born thing - because the parents are more nervous, the kids are always 'crazier' (his words, not mine). He said it about his own kids too. But in this thread, someone's 3rd child was the problem sleeper, so i think it's just luck.
Do what you feel comfortable doing... you know your child best. Try to evaluate the 'why' of his waking... waking for comfort, to me, is ok, and i'd comfort my child (just my personal opinion). BUT you all need sleep too. Crying for 3 hours then vomiting is a little too much for me, but i'm really a wimp too w/ this stuff.
My friend did part-time family bed. There are so many things you can do without doing any extreme (the extremes being cio, full-time family bed, etc). Can you put him down in his crib? What time does he go down? My dd couldn't sleep more than 6 hours at a clip till way older (like 4 or 5 years old)... if I got her to sleep at 8 or 9pm, she'd be up at 3am wanting to do crafts (she was old enough to ask to do crafts!). Her bedtime was with us at 11pm because of this. Then she napped during the day. My friend also bought her dd a full size bed so she or dh could lay w/ dd in her own bed, own room, as she got older, to wean her from their bed. It's a rare child who can just go down easily alone in their own room and sleep all night alone. In real life, I know of very few like this.
Good luck!