GoingLoopyQuickly to answer your questions:
"Who thinks they will name the bump before DDay? And if so, will you share the news?"
If we can, we will decide on a name before delivery, with 99% certainty. We will both agree that if for some reason, the baby doesn't look like the name (ifyswim), that we could hold back and discuss it again - hence the 1% of uncertainty! We won't tell anyone until the baby is here, to avoid any comments or feedback on it.
"Do you have any littles starting to behave differently? Or have any experience of it?"
My DS is 3.5, and has been a bit different to usual since being told about the baby. He has been a bit more clingy, and more unsettled with sleep, but this is beginning to settle down. It could well have been something that would happen anyway, it's impossible to tell if it is a coincidence or not. As he's a bit older, he's been able to ask lots of questions which I think has helped him express any concerns. I am expecting him to maybe change his behaviour again when the baby actually arrives, as I think it's quite common for them to regress. I'm going to spend a bit of time thinking about how best to handle him meeting the new baby so that he doesn't feel left out/replaced.