I've always fed DS2 to sleep. Well, DS1 as well actually, but we got him out of it at around 15 months. Ds2 is now 6 months and WILL NOT fall asleep without my boob in his mouth!! I've tried the Pantley pull off but it just seems to make him cross. Shush/pat doesn't make a dent and I was scarred by a night of PUPD with DS1. I just can't seem to make that work.
We cosleep too, which is fine for us at night but when he goes to bed round 7:30, he seems to know if I try to get up to leave to, I dunno, do some housework or say hello to my DH! Then he wakes up and it's got to be boob again before he goes back to sleep!
I am tempted to wean altogether, but I know there are added health benefits with extended breastfeeding.
I'm looking for any advice or success stories, rather than "you've made a rod etc etc". I did what I had to do to get the sleep I needed in the first 6 months of having a toddler and a newborn! :)