I looked into paying house payments sometime back, but credit cards generally will view that as a "cash advance", which does NOT generate rewards--and will probably also have different financing terms.
Something else to watch for... If you decide to finance your Disney vacation and intend to take advantage of the "6 months no interest" deal with Disney Visa, I'd watch for a "catch". I'm pretty sure that there will be a clause in the fine print that says something like "principal payments will be applied first to the lowest interest rate balance." This is on most credit cards offering temporarily low rates for balance transfers, etc.. So, my understanding is that you can't pay off OTHER things that are accruing interest while you have a balance sitting there at "0% interest".
For this reason, I only used the Disney card to charge my actual vacation. I used another credit card that also pays 1% for other purchases.
Also, I like the fact that my other card actually gives me CASH back, vs. "Disney dollars". I like Disney, but I like flexibility more. Now, if they'd make it 5% in Disney dollars, I'd use the Disney card more, but if they're the same, I don't see why I should limit myself to only being able to use it for Disney purchases.