Congratulations on the baby Casanova! I hope everything went well for the delivery. I can't help you with the CCL website issue. Maybe one of the others can. But as far as what is too early to book, only you can answer that question. What would you do with the baby while on the cruise?
If you have someone that is willing to watch a baby, the next biggest question is hwo long it will be before your wife is willing to leave the baby for a week. I would say six months at least for the babies health. After that it is up to you and your wife.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013