One of my biggest worries about having kids so far apart is that they won't be have a close relationship. I would have never chosen to wait this long, but the economy and lost jobs made the decision for us unfortunately.
Anyway, we told DS right away about the baby (sidenote: I hope I don't end up regretting that) and he's already started asking about the baby in my belly. Today he was rubbing my belly saying that he was "patting" the baby. He keeps bringing me blankets so I can keep the baby warm. And this afternoon he asked to lay down with his head on my belly so he could cuddle with the baby. Gah! My heart is bursting! I can't wait to see him with his little brother or sister when he/she arrives.