Hi potato and other knackered friends!
Well, this is night 3 of CC. I'm following the instructions as listed on the Supernanny website. I've been staying with my mum this week, so haven't been as worried about disturbing my own neighbours, and also felt emboldened to try CC due to Potato's experiences and by my mum cheerfully admitting "oh yes, at night time we just ignored you". I'm making light here of course, for me CC was something I had felt I would never do, but I was starting to feel angry with DD through sheer exhaustion and frustration. 
Anyway, it's worked a dream. Night 1 consisted of me being banished to the bedroom with ear plugs while mum dealt with DD. She cried for half an hour, then slept for 8.
Second night consisted of 4 minutes of very half hearted crying when I first put her into bed, and another 4 at about 3am. Overall she slept from 7pm til 7.30am.
The Supernanny instructions state 5 mins as the first intervention time, so I haven't needed to go into DD at all. This hasn't tested my suspicion that me being in the room would wind DD up more, as she wouldn't be able to understand why she wasn't being picked up. Fingers crossed we keep it under 5 mins and never need to find out!
I would never have waited for 4 mins of crying before, and I'm wondering whether this was putting into place a vicious cycle, I would go to soothe DD, but somehow this was only encouraging her to sleep lightly in short cycles. I haven't needed to go in, but the Supernanny site is very clear that there is no picking up, patting etc.
I needed to be 100% sure that DD couldn't be waking through hunger, so have been giving a snack of solids at 3pm, a meal at 5pm, as much milk as she likes at 7pm and a dreamfeed at 10. We're BLW so thankfully don't feel the pressure of trying to reduce her milk intake.
Hoping the change continues, so far the transformation has been miraculous!
Apologies for the long post!