Meadow, I applaud your waiting until your ds has finished teething to sort out his sleep. He needs comfort when in pain. Calpol can only relieve the pain to a certain extent. He still wants his mummy.
nannyme/crusts, you wrote about parents taking a poorly child into their bed: "I feel that this is the last thing the child needs as it is yet another disruption when they are already feeling rotten. Imagine if someone started putting you in their bed when you felt like crap and you couldn't sleep well because of it, although the cuddles were nice! After a night or two you'd probably be wishing for a good night's sleep in your own bed with things just as they normally are!"
I wonder what is your basis for saying that babies need to sleep in their own bed to get a good nights' sleep. In fact, the reverse is true. Babies are designed to sleep lightly and have short sleep cycles, which is why a baby might have just closed their eyes 20 mins ago only to wake up again. This is a survival mechanism so that they wake frequently to ensure that their parent is nearby. Which is why most babies are comforted by the presence of a human being when they sleep. The insistence that a baby sleep through requires them to sleep deeply alone from a very young age, which is actually against their biology and some experts believe, contributes to cot death in Western society, a concept virtually unheard of in cultures that co-sleep as a matter of course. Some babies' sleep patterns simply take longer to mature - and I don't mean months, it could be a year or more.
You asked about my dd's sleep. We co-sleep. I nursed her to sleep until 18 months, then weaned her from the breast, whereupon she miraculously started sleeping through 11 hours. I then wheeled to sleep until she was 2.5 years! Now at 3.2, she falls asleep with either dh or I in bed with her after 5 mins and a bedtime story. She rarely wakes at night now, and if she does, settles quickly. And I can honestly say that sharing sleep with her is lovely and is a big part of our relationship. Our intention is that when our ds (3 months) is older (who also sleeps with me), they will share a bed together.
It is not for everyone, to say the least! But I am proud that dd sleeps so well now, no nightmares, terrors or wakings, just lots of cuddles