My wife and I honeymooned at WDW in 2002. We've since been back every year. Here are a few things you might want to try:
* Ice Cream Social re-hitching ceremony.
* Dinner @ V&A. We will only do this ONCE but it was on our honeymoon on valentines day so we splurged.
* Breathless Cruise (we did that too - great choice!)
* Fultons Crab House, Yachtsman, Narcoossees, etc.
* GET THE EARS. There are Mickey/Minnie ears that you can get that look like a top hat and veil. We bought ours ahead of time on ebay and wore them on the plane down there.
* Consider staying on a concierge level. The extra pampering is nice.
* Do a disney photo shoot. When we went, we were on the "Honeymoon Discovery Magic" package which included a Disney photographer for an hour or so basically walking around MK taking photos of us in front of things., Then they sent a nice leather-bound album up to us. GREAT keepsake.
* Note on every reservation its your honeymoon. You'll be surprised the "extra" magic you get!
* DW went parasailing. I stayed SAFELY in the boat and watched.
I think thats it... Enjoy and congrats!