IMHO, I think anyone who posts should always respect the opinions or ideas of other posters. I know that topics like this can result in personal attacks and all kinds of opinions on parent-child relationships and child-rearing. No one ever agrees, and it gets ugly sometimes. So let's just all get along! We are all just trying to be helpful here...
That being said, Jon99 din't even specify the exact date that he was planning to go. It could be months after the baby is born for all we know. And his leaving the baby with parents for a few days was just a suggested question, maybe when the baby would be older. I don't think it's fair to just assume that Jon is going to do all these things. I'm sure the reason he posted was to make an informed decision. Let's not make conclusions about his disposition to being a father, he obviously sounds excited!
Jon99 I would take into account what tjkraz said about baby's schedule, and perhaps waiting until the baby is born to talk about a trip to WDW. LIke I posted earlier, I had my first-born 9 months ago. THERE ARE NO WORDS TO DESCRIBE BEING A PARENT FOR THE FIRST TIME!!! At least not enough words... The first 1-2 weeks are sleepless, exhausting nights. Rewarding in the end, yes. but it does take patience and getting to know your baby. My DD was up every 2 hours for the first few weeks. Also, like tjkraz suggested, see how your wife feels. For me, the recovery stage was WORSE than actual labor! It's painful, and healing from that experience takes time.
As for leaving the baby behind to go to WDW, I wouldn't suggest that. I don't think it would be bad if you had your parents with you when you went, and you and the wife had a few hours to hit the parks on your own (everyone has a differing opinion on this idea, so beware). But i think once you have your little one, you won't want to spend a second away from her or him.
I think the best idea is to wait until your baby is born, and then when you feel she is old enough to handle being out take her along. I promise it will be an experience you will never forget. Once he or she is born, you will know if they like being taken out. DH and I started taking our DD to the mall when she was 1 week old (of course, by this time I had cabin fever and thought I would go nuts if I didn't get out of the house!!!

) BUt ever since then she has loved going out with mommy and daddy, and enjoys all the new things she sees. I know it's hard to get rid of the Disney itch, but for the time being I would suggest waiting until the baby is born to see how you and your wife feel.
Sorry so long! I hope that helps.