This sounds fun; like a slumber party every night! :)
No kidding! My parents just visited for 10 days (they live 1000 miles away), and you should have seen the look on my Mom's face when she saw our family bedroom and the 3 empty kids' rooms down the hall! She was pretty cool about it in the end though, and commented on how easy bedtime was with all three in the same place. Glad to see we're not the only ones, especially not the only ones with older children in the family bedroom.
We share a bedroom with our 3 year old and our 4 month old. Our bed is a queen and a double bed pushed together. Our bedroom has french doors that open up to a playroom where we have their dressers as well as toys. I love this situation. I remember being kicked out of my parents bed when I was about 4 and I remember lying alone in the dark and being so sad. And I also remember going on trips and the whole family sleeping in the same room at grandmas or wherever and feeling so cozy and happy in a room with my mom and dad and sisters :) So because I remember how much better sleeping in the same room felt, I am so happy to give that to my kids. These days before I fall asleep at night it usually drifts thru my mind how freakin awesome our family bedroom is.
As for the pp who was worried about an older child feeling screwed up by sleeping with parents, my 15 yo ds slept with us (well, with just me until I married my DH when he was 6 and then us after that) until he was 8 or 9ish. He looks back with fondness on those days and sometimes still comes in while we are all going to sleep. He doesn't cuddle with us or anything but he lays on our floor while we all talk or read books or whatever. I think the bonding that comes with drifting off to sleep together is the coolest thing!