If someone were to ask me today, "At what age did your kids start sleeping through the night?" - I would answer, "I don't know yet."
Our Little Bitty has had sleep issues on and off since she came home. Actually, if she is in our bed with us - she has no issues. She sleeps like a queen. However, she has never been fond of her crib. So, about a month ago - we did away with the crib. Our Little Bitty 14 month old now sleeps on a twin size mattress on her bedroom floor. This change has actually worked great for her - in fact, the night before last she did not wake up once until 6am. This was HUGE! But, it seems to have been a fluke - she was up around 3am last night wanting to come snuggle. She stands at the little gate at her bedroom door (to prevent nighttime wandering) and calls for us. I can either go in her room with her and help her get back to sleep and then creep back to my room - or I can scoop her up and put in our bed. I'm not completely consistent with which I choose to do. It usually depends on if it is the first time its happened that night - or the seventh (seriously).
Brother was similar to this - and thankfully now does sleep through the night. He's almost 4. Our challenge with him is getting him to go to sleep. However, although our nighttime story and snuggle time is more drawn out than it should be - I do cherish it. Plus -I know that he won't go off to college and still need me to read to him, tell him stories and do criss-cross applesauce on his back.
The funny thing about our kids' sleep habits is that I no longer really want to hear any advice or suggestions on how to make it better. I've read the books, I've listened to what works for others and we've tried many different approaches. Now, I'm just resigned to the fact that this is how it works in our family and since our kids are happy and well-adjusted - I'm just going to keep getting up once, twice, seven times during the night until Little Bitty also outgrows this phase.
In the meantime, I drink plenty of coffee and Diet Coke to keep me sharp during the day (yes, that is debatable). In fact, since I now buy my coffee here: http://www.juananacoffee.com/ my caffeine consumption is actually making the world a little bit better place.