Jack and Leah have been sharing a room for about a month, and it's actually going quite well. We've had a couple of nights that were less than peaceful, but we're learning and getting better every day.
On Saturday morning, I woke up to Jack talking to me on the monitor: "Mommy, come here! Leah woke up with no crying!" Too cute. So I went into their room and he was just standing at the crib talking to her. He turned to me and said, "She just woke up and looked at me!"
Yeah, Jack's got this big brother business down pat. :)