I just found this thread the other day and I am still making my way through all of it. I was thinking about renting a lens for my D90 for my upcoming trip to The World, so I was looking into what type of lens to get. I currently have a Nikon 18-55mm kit, Nikon 70-300mm kit, and a Nikon 50mm f/1.8. After wading through several pages here (and reading other sites dedicated to WDW photography) I put in my rental order for a Tokina 11-16mm f/2.8 DX today. I will receive it a few days before I leave so I can 'learn' it.
There are some phenomenal photos in here and to say I was inspired would be an understatement. If I can get photos even half as good as some of these I will be a happy camper!