I received a estimated budget proposal as well. My father is picking up the bill for the wedding day, so he wanted to see a breakdown. It extends the planning process a bit, I think (which is why I get so nervous for not having my contract yet); but its very helpful in weeding out unnecessary expenses.
FYI, its very general and most of the prices are already listed in their website, either the weddings section or the wishbook. But what is helpful is the that they incorporate the gratuity into some of their costs (which I find helpful, less for me to think about).
For example, for the florist section, they will quote it this way:
Bride's bouquet, $250+
Bridesmaids bouquet, $125+ (then they will multiply that by # of BM)
Basket w/petals 4 flwrgl $45
for reception, they plug in a sample menu from the website,
and add in the bar ($41 per for premium open bar); soda for kids, etc
it can include everything you want in it.
I actually pumped mine up a bit (w/ premium Disney photo, video, bar, etc.) so that I could just get the shock and awe from my father out of the way

, so now I'm just downsizing to the more realistic ideas that I had before. (Devious but necessary)

And of course, getting so many ideas from the Disney Brides here!
Hope that helps.