I love the moments you capture and the background lighting =)
BTW, I got my background, but it definitely needs lights! I have an extra flash, but not the radio receiver. I like how you can make it all white out. It's not as simple as adjusting levels...
My only complaint is that his diaper fades into the background in the first and looks a little off (magical disappearing bum), but I'm not sure a cure would be better since you don't really want to be drawing attention to it either.